Polystyrene Cone shaped hole cutter

[garage nut]

Thanks for that idea, I am just always very scared when it comes to wall power I have has some shocking experiences with it already.

I tried calculating the resistance I would need, but ended up just putting a double contact globe in series. Initially it was too hot and did not give me enough time to change hands while rotating the cutter. Also needed the cutting done quickly so no time to look at adjustable power supply, but your idea is lying in a box somewhere in my garage.