Interesting build for a foam cutter

I was a bit surpised at this build. Its pretty straight forward to make and cheap. But what was interesting is the use of a coping saw as the cutter holder and applying the power thru the saw. Me…I think I would wrap the coping saw frame in some electric tape, just in case. Still a nice build to get a cutter up and running pretty fast. Oh and I think I would add in a switch too.

https://www.instructables.com/id/Foam-Cutter-2/