diff --git a/parinfer-rust-changes.el b/parinfer-rust-changes.el
index 0157c29..b0b2ddf 100644
--- a/parinfer-rust-changes.el
+++ b/parinfer-rust-changes.el
@@ -87,7 +87,7 @@
     changes))
 
 (defun parinfer-rust--fetch-changes (id)
-  "Fetch changes for current buffer using signal ID."
+  "Fetch change for current buffer using signal ID."
   (track-changes-fetch id
                        (lambda (start end before)
                          (if parinfer-rust--disable
@@ -102,16 +102,13 @@
                                         (parinfer-rust--get-cursor-x)))))
                              (push (list 'lineNo lineNo
                                          'x x
-                                         'start start
-                                         'end end
                                          'length (length before)
                                          'before-text before
-                                         'after-text (buffer-substring-no-properties start end)
-                                         'group nil)
+                                         'after-text (buffer-substring-no-properties start end))
                                    parinfer-rust--changes))))))
 
 (defun parinfer-rust--changes-signal (id &optional distance)
-  "Signal changes for ID with optional DISTANCE."
+  "Signal change for ID with optional DISTANCE."
   (parinfer-rust--fetch-changes id)
   (if distance
       ;; We're still in the middle of changes, but they're "far",
diff --git a/parinfer-rust-helper.el b/parinfer-rust-helper.el
index bff20dc..b78f10e 100644
--- a/parinfer-rust-helper.el
+++ b/parinfer-rust-helper.el
@@ -28,6 +28,7 @@
   (declare-function parinfer-rust-mode-enable "parinfer-rust-mode")
   (defvar parinfer-rust--mode)
   (defvar parinfer-rust-dim-parens)
+  (defvar parinfer-rust-buffer-replace-strategy)
   (defvar parinfer-rust-mode))
 (require 'url)
 
@@ -139,7 +140,10 @@ Uses PARINFER-RUST-VERSION to download a compatible version of the library."
 
 If the user does not disable these modes then it may cause bugs or crashes"
   (let ((warning-list))
-    (dolist (mode parinfer-rust-troublesome-modes)
+    (dolist (mode (if (eq parinfer-rust-buffer-replace-strategy
+                          'fast)
+                      (cons 'flyspell-mode parinfer-rust-troublesome-modes)
+                    parinfer-rust-troublesome-modes))
       (when (parinfer-rust--is-active-minor-mode mode)
         (push mode warning-list)))
     (if (and
@@ -242,6 +246,7 @@ mode to better emulate users."
     (cond ((< num 0) 0)
           ((> num max) max)
           (t num))))
+
 (defun parinfer-rust--defer-loading (&rest _)
   "Defer loading of `parinfer-rust-mode' until the buffer is in focus."
   ;; This is a parinfer enabled buffer that started in the background and has now been moved to the foreground
@@ -250,6 +255,7 @@ mode to better emulate users."
                  (window-buffer (selected-window))))
     (remove-hook 'window-selection-change-functions #'parinfer-rust--defer-loading t)
     (parinfer-rust-mode-enable)))
+
 ;; Disable fill column warning only for this buffer to enable long strings of text without
 ;; having to do a weird mapconcat.
 ;; Local Variables:
diff --git a/parinfer-rust-mode.el b/parinfer-rust-mode.el
index b64d9fd..7cb2271 100644
--- a/parinfer-rust-mode.el
+++ b/parinfer-rust-mode.el
@@ -384,32 +384,33 @@ See `parinfer-rust--option-type' for a more complete explanation of the options.
   :type parinfer-rust--option-type
   :group 'parinfer-rust-mode)
 
-(defvar parinfer-rust-major-mode-options
-  (list
-   'clojure-mode parinfer-rust-clojure-options
-   'clojurec-mode parinfer-rust-clojure-options
-   'clojurescript-mode parinfer-rust-clojure-options
-   'janet-mode parinfer-rust-janet-options
-   'common-lisp-mode parinfer-rust-lisp-options
-   'racket-mode parinfer-rust-racket-options
-   'scheme-mode parinfer-rust-scheme-options
-   ;; This doesn't work - there is no guile mode but I am not sure what we can
-   ;; use to set guile specific options
-   'guile-mode parinfer-rust-guile-options)
-  "Major mode specific options for that controls how the parinfer-rust library behaves.")
 ;;;;;;;;;;;;;;;;;;;;;;;;;
 ;; Setup
 ;;;;;;;;;;;;;;;;;;;;;;;;;
-
-(defconst parinfer-rust--mode-types '("indent" "smart" "paren")
-  "The different modes that parinfer can operate on.")
-
 (require 'parinfer-rust parinfer-rust-library t)
 (require 'parinfer-rust-changes)
 
 (require 'subr-x)
 (require 'font-lock)
 
+(defconst parinfer-rust--mode-types '("indent" "smart" "paren")
+  "The different modes that parinfer can operate on.")
+
+(defvar parinfer-rust-major-mode-options
+  (list 'clojure-mode parinfer-rust-clojure-options
+        'clojurec-mode parinfer-rust-clojure-options
+        'clojurescript-mode parinfer-rust-clojure-options
+        'clojure-ts-mode parinfer-rust-clojure-options
+        'clojure-ts-clojurescript-mode parinfer-rust-clojure-options
+        'janet-mode parinfer-rust-janet-options
+        'common-lisp-mode parinfer-rust-lisp-options
+        'racket-mode parinfer-rust-racket-options
+        'scheme-mode parinfer-rust-scheme-options)
+  ;; Rewrite this string to be more readable
+  "A plist that controls how parinfer-rust behaves for a given major mode.
+
+For more information see `parinfer-rust--option-type'")
+
 ;; Check version and prompt to download latest version if out of date
 ;; Problem: Emacs can't reload dynamic libraries, which means that if we
 ;; download a new library the user has to restart Emacs for changes to take effect.
@@ -612,10 +613,17 @@ CHANGES."
                   (switch-to-buffer current)
                   (if (eq parinfer-rust-buffer-replace-strategy
                           'fast)
-                      (progn
+                      (let ((window-start-pos (window-start)))
                         (delete-region (point-min)
                                        (point-max))
-                        (insert-buffer-substring new-buf))
+                        (insert-buffer-substring new-buf)
+                        (when (not (= window-start-pos
+                                      (window-start)))
+                          ;; If the buffer is not pixel aligned, this will cause a slight jump. But
+                          ;; if we want speed and not to jump around too much, this is the best we
+                          ;; can do for now. I wish there was a way to maintain buffer height with
+                          ;; pixel precision.
+                          (set-window-start (selected-window) window-start-pos)))
                     (replace-buffer-contents new-buf 1))
                   (kill-buffer new-buf)
                   (undo-amalgamate-change-group change-group)))))
@@ -663,6 +671,8 @@ If a change is detected in the buffer, prompt the user to see if they still want
 Disable `parinfer-rust-mode' if the user does not want to have
 parinfer autofix them, or if there is no reasonable way for
 `parinfer-rust-mode' to automatically fix them."
+  ;; TODO: this should only run the first time the buffer is actually changed.
+  ;; buffer searching or navigating should not trigger this.
   (setq-local parinfer-rust--disable nil)
   ;; Disable change tracker for now because we are about to make changes in an change hook.
   (track-changes-unregister parinfer-rust--change-tracker)
@@ -674,7 +684,7 @@ parinfer autofix them, or if there is no reasonable way for
     (setq-local parinfer-rust--change-tracker
                 (track-changes-register #'parinfer-rust--changes-signal
                                         :disjoint t)))
-  (remove-hook 'first-change-hook #'parinfer-rust--check-for-issues t))
+  (remove-hook 'pre-command-hook #'parinfer-rust--check-for-issues t))
 
 (defun parinfer-rust--switch-mode (&optional mode)
   "Switch to a different Parinfer MODE.
@@ -716,7 +726,8 @@ Checks if MODE is a valid Parinfer mode, and uses
   (when parinfer-rust--change-tracker
     (track-changes-unregister parinfer-rust--change-tracker)
     (setq-local parinfer-rust--change-tracker nil))
-  (remove-hook 'first-change-hook #'parinfer-rust--check-for-issues t)
+  (remove-hook 'pre-command-hook #'parinfer-rust--check-for-issues t)
+  (setq-local parinfer-rust--disable nil)
   (parinfer-rust--dim-parens))
 
 (defun parinfer-rust-toggle-disable ()
@@ -755,8 +766,7 @@ This includes stopping tracking of all changes."
                    buffer-read-only)
                ;; Defer checking for changes until a user changes the buffer
                (setq-local parinfer-rust--disable t)
-               (add-hook 'first-change-hook #'parinfer-rust--check-for-issues nil t))
-
+               (add-hook 'pre-command-hook #'parinfer-rust--check-for-issues nil t))
               ((eq 'immediate parinfer-rust-check-before-enable)
                (setq-local parinfer-rust--disable t)
                (parinfer-rust--check-for-issues))
@@ -813,7 +823,7 @@ not available."
    (t
     (parinfer-rust-mode-enable))))
 
-(setq-default parinfer-rust-mode-hook '(parinfer-rust--auto-apply-fast-mode))
+
 (provide 'parinfer-rust-mode)
 
 ;;; parinfer-rust-mode.el ends here
diff --git a/readme.org b/readme.org
index f96a422..277ce87 100644
--- a/readme.org
+++ b/readme.org
@@ -102,6 +102,20 @@ For the more adventurous, you can also download and compile the ~parinfer-rust~
        (setq parinfer-rust-library "/path/to/parinfer-rust-library.so")
      #+END_SRC
 
+** Modes
+Parinfer can operate under three different modes when writing lisp.
+*** Paren
+    Paren Mode gives you full control of parens, while Parinfer corrects indentation. You can still adjust indentation, but you won't be able to indent/dedent past certain boundaries set by parens on previous lines.
+
+    [[./videos/paren-mode.gif]]
+*** Indent
+    Indent Mode gives you full control of indentation, while Parinfer corrects or inserts close-parens where appropriate. Specifically, it only touches the groups of close-parens at the end of each line.
+
+    [[./videos/indent-mode.gif]]
+*** Smart
+    Smart Mode is like Indent Mode, but it tries to preserve the structure too.
+
+    [[./videos/smart-mode.gif]]
 ** Commands
    | Command                    | Description                                           |
    |----------------------------+-------------------------------------------------------|
@@ -118,20 +132,6 @@ For the more adventurous, you can also download and compile the ~parinfer-rust~
      (define-key parinfer-rust-mode-map (kbd "C-c C-p d") #'parinfer-rust-toggle-disable)
    #+end_src
 
-** Modes
-   Parinfer can operate under three different modes when writing lisp.
-*** Paren
-    Paren Mode gives you full control of parens, while Parinfer corrects indentation. You can still adjust indentation, but you won't be able to indent/dedent past certain boundaries set by parens on previous lines.
-
-    [[./videos/paren-mode.gif]]
-*** Indent
-    Indent Mode gives you full control of indentation, while Parinfer corrects or inserts close-parens where appropriate. Specifically, it only touches the groups of close-parens at the end of each line.
-
-    [[./videos/indent-mode.gif]]
-*** Smart
-    Smart Mode is like Indent Mode, but it tries to preserve the structure too.
-
-    [[./videos/smart-mode.gif]]
 ** Customizations
 parinfer-rust-mode is purposefully light on option, but it does give a few options to tweak behavior.
 
@@ -214,12 +214,19 @@ Options:
   node `(elisp)Replacing'
 
   Options:
-    * safe
-    * fast
+     + safe
+     + fast
     
   #+begin_quote
   default: safe
   #+end_quote
+  
+*** Guile Support
+If guile is your flavour of scheme you can override the scheme option in the ~parinfer-rust-major-mode-options~ plist with ~parinfer-rust-guile-options~.
+
+#+begin_src elisp
+  (setopt parinfer-rust-major-mode-options (plist-put parinfer-rust-major-mode-options 'scheme-mode 'parinfer-rust-guile-options))
+#+end_src
 ** parinfer-mode
    There is an alternate implementation of Parinfer for Emacs called [[https://github.com/DogLooksGood/parinfer-mode][parinfer-mode]]. It currently has support for Parinfer's "paren" and "indent". Additionally, it has had experimental support for "smart" mode, however, this has remained hidden on a branch and not accessible from MELPA for over a year.
    parinfer-smart-mode aims to be a simpler adaptation of Parinfer that just offers "smart mode", leveraging the parinfer-rust plugin to do most of the heavy lifting.