I don't have a plan, but you can go to hobby lobby. Yup, go the fake flower section, around the styrofoam. It is a foam cutter. I use it for that sheet insulation. No squeeky noises.
Anyway, it is a tube, like a flashlight with 2 d cells. A little piece of metal - like a coping saw that you string the wire through. You just swing the little metal tab and boom the wire is hot.
I'll have to get mine out and see if it is wide enough for a frame. Maybe a shallow.
Do they make coping saws wider than the width of a deep? Hmmmm. Looks like a trip to home depot is in the works for me.
Martha in KC