1. Enclosure
Before buying all the different parts, it is a good idea to print the entire thing to get a good feel of the remote. The remote is a thumb-based design, based on the Boosted remote, that for some don’t feel quite right.
When printing the parts I recommend printing the enclosure (top and bottom) facing down so that you won’t need any support. Use a high infill (+60%) and a low layer height (100-200 microns) to get a nice surface, and a strong remote. The material isn’t crucial, nonetheless, a carbon infused PLA adds that extra bit of strength, and give the entire build a more robust fell.
Insert the two 5mm magnets into the thumb wheel, with different polarity downwards. Chances are that you insert the magnets reverse so that pushing the throttle forwards brakes. If this is the case you can easily pop out the magnets with a pin on the bottom and reverse them. Tip: You could use the hall sensor to tell the polarity of the magnet even before you push them in place.
Insert the thumb wheel, the trigger and the rest of the mechanical items.