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You can do myfocuser pro2 without temp comp etc. Or there's onstep focuser. I use pro2 - with an Arduino Uno (eleven). It has a prototyping area- so you can just solder in a stepper driver. Nice and compact.
I made similar 3d printed brackets. But I direct drive the focuser with a coupler and use microstepping to get the resolution - much less backlash.
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