For this mod I would like to add a mosfit our a bigger switch the one in it is 3a/250volt now if u look at the battery part it takes 2 26650 batts so no room batts go from side so to add a mosfet it would need to go on the top part of the mod and I don't think it can be done take a look and tell me how u would add our point out the best switch to put in I'm building.15-.25 coils
Thanks
Thanks