I'm sorry that supports are needed for the two big main sides, but this time I wanted to reduce as much as possible the number of parts needed to build a controller.
0.4mm perimeters and 0.2 or 0.1 layer height will be good for the main parts. The trigger and Trigger Holder should not be a problem for you, anyway the fit of the trigger over the pot should be semi-easy, not too hard. Remember to use some "negative horizontal expansion" in your slicer if you need it to have the right fit.