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Wow Andrew, you did trim the RF bracket down! Have you still got the two screws holding the RF stepper onto the bracket? You'll want to make sure that mounting is as rigid as possible. If there is any give or flex, it will make repeatable automatic focusing difficult. You've got a 55 micron CFZ so you should still hit it ok - with a low step size.
This is what you read in the manual;
Direction. To check the RoboFocus direction, push the OUT button. You will notice that when you push the button, the stepper executes one step (with a beep), waits for 1/2 second, then starts running at full speed. This system allows making small focus changes when operating manually. If the RoboFocus OUT button moves the focuser out (CCW on an SC scope), the direction is OK. If the direction is wrong, turn off the RoboFocus. After about ten seconds, turn on the RoboFocus while pressing the OUT button. As the RoboFocus powers up, it will sense the OUT button, will reverse itself (switching from inward to outward), and will record the new button direction. After several seconds the RoboFocus will start running outward and you can release the button. The RoboFocus will remember this direction information for future sessions.
You can also calibrate start and end points (i.e total draw tube travel) if you are keen (you need to do this to achieve automated computer assisted focusing anyway), but it will be easier when you know the final imaging train configuration as you may require some spacers for the camera to reach focus. If you're using the 2" fittings (TKP27110 and TKP31112) make sure the thumb screws are tight to avoid flexure.
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