Hand held rechargeable foam cutter

I wanted a small(ish) battery powered hot-wire foam cutter. I had plenty of spare Li-ion 18650 cells laying around so I decided to spin one up in 123D Design.

This cutter uses a TP4056 Li-ion single cell charge and low voltage protection board, 18650 sized Li-ion cell, 6mm square momentary contact push button switch, 26 awg wire, and 1/16th inch music wire.

The music wire is bent to match the grooves in the base, and then cut at the 6 inch mark sticking out of the base. The bends on the