diff --git a/build.sbt b/build.sbt
index d6f63e3..7899d9f 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,4 +1,4 @@
-ThisBuild / baseVersion := "0.7.0"
+ThisBuild / baseVersion := "0.8.0"
 
 ThisBuild / organization      := "ai.entrolution"
 ThisBuild / organizationName  := "Greg von Nessi"
diff --git a/src/main/scala/thylacine/model/components/posterior/HmcmcSampledPosterior.scala b/src/main/scala/thylacine/model/components/posterior/HmcmcSampledPosterior.scala
index 847b692..fc8811b 100644
--- a/src/main/scala/thylacine/model/components/posterior/HmcmcSampledPosterior.scala
+++ b/src/main/scala/thylacine/model/components/posterior/HmcmcSampledPosterior.scala
@@ -36,8 +36,7 @@ import scala.collection.immutable.Queue
 
 case class HmcmcSampledPosterior[F[_]: STM: Async](
   private[thylacine] val hmcmcConfig: HmcmcConfig,
-  protected override val hamiltonianDifferentialUpdateCallback: Double => F[Unit],
-  protected override val sampleProcessedCallback: HmcmcTelemetryUpdate => F[Unit],
+  protected override val telemetryUpdateCallback: HmcmcTelemetryUpdate => F[Unit],
   private[thylacine] val seed: Map[String, Vector[Double]],
   private[thylacine] override val priors: Set[Prior[F, _]],
   private[thylacine] override val likelihoods: Set[Likelihood[F, _, _]],
@@ -81,8 +80,7 @@ object HmcmcSampledPosterior {
   def of[F[_]: STM: Async](
     hmcmcConfig: HmcmcConfig,
     posterior: Posterior[F, Prior[F, _], Likelihood[F, _, _]],
-    hamiltonianDifferentialUpdateCallback: Double => F[Unit],
-    sampleProcessedCallback: HmcmcTelemetryUpdate => F[Unit],
+    telemetryUpdateCallback: HmcmcTelemetryUpdate => F[Unit],
     seed: Map[String, Vector[Double]]
   ): F[HmcmcSampledPosterior[F]] =
     for {
@@ -94,18 +92,17 @@ object HmcmcSampledPosterior {
       jumpAttempts             <- TxnVar.of(0)
       posterior <- Async[F].delay {
                      HmcmcSampledPosterior(
-                       hmcmcConfig                           = hmcmcConfig,
-                       hamiltonianDifferentialUpdateCallback = hamiltonianDifferentialUpdateCallback,
-                       sampleProcessedCallback               = sampleProcessedCallback,
-                       seed                                  = seed,
-                       priors                                = posterior.priors,
-                       likelihoods                           = posterior.likelihoods,
-                       currentMcmcPositions                  = currentMcmcPositions,
-                       burnInComplete                        = burnInComplete,
-                       workTokenPool                         = workTokenPool,
-                       jumpAcceptances                       = jumpAcceptances,
-                       jumpAttempts                          = jumpAttempts,
-                       numberOfSamplesRemaining              = numberOfSamplesRemaining
+                       hmcmcConfig              = hmcmcConfig,
+                       telemetryUpdateCallback  = telemetryUpdateCallback,
+                       seed                     = seed,
+                       priors                   = posterior.priors,
+                       likelihoods              = posterior.likelihoods,
+                       currentMcmcPositions     = currentMcmcPositions,
+                       burnInComplete           = burnInComplete,
+                       workTokenPool            = workTokenPool,
+                       jumpAcceptances          = jumpAcceptances,
+                       jumpAttempts             = jumpAttempts,
+                       numberOfSamplesRemaining = numberOfSamplesRemaining
                      )
                    }
       _ <- posterior.launchInitialisation
diff --git a/src/main/scala/thylacine/model/core/telemetry/HmcmcTelemetryUpdate.scala b/src/main/scala/thylacine/model/core/telemetry/HmcmcTelemetryUpdate.scala
index 75c00fa..12a65fa 100644
--- a/src/main/scala/thylacine/model/core/telemetry/HmcmcTelemetryUpdate.scala
+++ b/src/main/scala/thylacine/model/core/telemetry/HmcmcTelemetryUpdate.scala
@@ -20,9 +20,22 @@ package thylacine.model.core.telemetry
 case class HmcmcTelemetryUpdate(
   samplesRemaining: Int,
   jumpAttempts: Int,
-  jumpAcceptances: Int
+  jumpAcceptances: Int,
+  hamiltonianDifferential: Option[Double]
 ) extends TelemetryReport {
 
-  override lazy val logMessage: String =
-    s"HMCMC Sampling :: Samples remaining - $samplesRemaining // Acceptance Ratio - ${jumpAcceptances.toDouble / jumpAttempts}"
+  override lazy val logMessage: String = {
+    val baseString =
+      s"HMCMC Sampling :: Samples remaining - $samplesRemaining // Acceptance Ratio - ${jumpAcceptances.toDouble / jumpAttempts}"
+    val acceptanceString =
+      if (jumpAttempts != 0) {
+        s" // Acceptance Ratio - ${jumpAcceptances.toDouble / jumpAttempts}"
+      } else {
+        ""
+      }
+    val hamiltonianDifferentialString =
+      hamiltonianDifferential.map(v => s" // exp(-dH) = ${Math.exp(-v)}").getOrElse("")
+
+    baseString + acceptanceString + hamiltonianDifferentialString
+  }
 }
diff --git a/src/main/scala/thylacine/model/sampling/hmcmc/HmcmcEngine.scala b/src/main/scala/thylacine/model/sampling/hmcmc/HmcmcEngine.scala
index 81b6c9e..8eeda40 100644
--- a/src/main/scala/thylacine/model/sampling/hmcmc/HmcmcEngine.scala
+++ b/src/main/scala/thylacine/model/sampling/hmcmc/HmcmcEngine.scala
@@ -51,8 +51,7 @@ private[thylacine] trait HmcmcEngine[F[_]] extends ModelParameterSampler[F] {
   protected def warmUpSimulationCount: Int
 
   protected def startingPoint: F[ModelParameterCollection]
-  protected def hamiltonianDifferentialUpdateCallback: Double => F[Unit]
-  protected def sampleProcessedCallback: HmcmcTelemetryUpdate => F[Unit]
+  protected def telemetryUpdateCallback: HmcmcTelemetryUpdate => F[Unit]
 
   /*
    * - - -- --- ----- -------- -------------
@@ -148,7 +147,16 @@ private[thylacine] trait HmcmcEngine[F[_]] extends ModelParameterSampler[F] {
         _ <- if (burnIn) {
                Async[F].unit
              } else {
-               hamiltonianDifferentialUpdateCallback(dH)
+               (for {
+                 remainingSamples <- numberOfSamplesRemaining.get
+                 jumps            <- jumpAcceptances.get
+                 attempts         <- jumpAttempts.get
+               } yield HmcmcTelemetryUpdate(
+                 samplesRemaining        = remainingSamples,
+                 jumpAttempts            = attempts,
+                 jumpAcceptances         = jumps,
+                 hamiltonianDifferential = Option(dH)
+               )).commit.flatMap(telemetryUpdateCallback)
              }
         result <- Async[F].ifM(Async[F].delay(dH < 0 || Math.random() < Math.exp(-dH)))(
                     for {
@@ -242,8 +250,9 @@ private[thylacine] trait HmcmcEngine[F[_]] extends ModelParameterSampler[F] {
                             jumps    <- jumpAcceptances.get
                             attempts <- jumpAttempts.get
                           } yield (jumps, attempts)).commit
-      telemetryResult <- Async[F].delay(HmcmcTelemetryUpdate(numberOfSamples, jumpsAndAttempts._2, jumpsAndAttempts._1))
-      _               <- sampleProcessedCallback(telemetryResult)
+      telemetryResult <-
+        Async[F].delay(HmcmcTelemetryUpdate(numberOfSamples, jumpsAndAttempts._2, jumpsAndAttempts._1, None))
+      _ <- telemetryUpdateCallback(telemetryResult)
     } yield ()
 
   private val getHmcmcSample: F[ModelParameterCollection] =