I'm not an expert but I think that once the INDI driver for the Microtouch focuser has been fixed it should work correctly with all apps using it : AstroImager, KStars / Ekos ... Wait until the next release.
In the mean time the driver works as long that you keep the tick count in the range 0 - 32767. Easy to do.
SO I have been following this thread and wondered if the MicroTouch focuser is selectable in the stellarmate device? I am thinking of getting it but did not want ot do so unless it supported the equipment I have.