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Greg, as I said. There is no perfect optical system.
Temperature and thermal expansion of components is an issue and depends on the coefficient of thermal expansion for those materials.
This goes for all OTA's - always will.
Yes the CDK can be difficult to keep in focus, however the Kendrick focuser matched to "trained" electronic focuser, resolves this. But you need to train the software.
The HD Mirror locks work well. Cooling like all SCT's it needs a good 60mins min to cool to ambient if not kept in a well vented observatory - same goes for the CDK. Internal thermal currents - non issue once reached ambient. Again care is needed not to over do the dew heaters.
As for compact... yes SCT's are that. But a HD14 is not small and getting onto the Paramount ME was a 2 man job.
Imaging at F11 is slow and a challenge. However, you soon learn how good or bad your mount is!
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