yes you use 2 microswitches that actuate before pushing in the trigger in place of the mechanical switch. one micro for foward direction one for reverse

the drill triggers current limit at ~15amps and are full variable speed. BUT they are very fiddly to make.

the work well and even if you do blow out the fet which is unlikely you can still use it as a full on off power switch.

ill let aaron chide in here on how to make them and post a photo because my versions are only half built but be warned they are damn tricky to make