Question: result channels with broadcast = False

[charlesbaynham]

Looking through the code, it seems like ResultSinks can be created (or rather, build()ed) with broadcast=False. Am I right, however, that this option isn't currently exposed to the user?

If so, would a PR that added broadcast as an optional parameter for the __init__ of a ResultsChannel and then used that parameter when creating a sink for it in

ndscan/ndscan/experiment/entry_point.py

Lines 280 to 286 in b7f335b

	if self.spec.axes:
	sink = AppendingDatasetSink(
	self, self.dataset_prefix + "points.channel_" + name)
	else:
	sink = ScalarDatasetSink(self, self.dataset_prefix + "point." + name)
	channel.set_sink(sink)
	self._scan_result_sinks[channel] = sink

sound like a good idea?