Looking around on the web for solutions, I found a guy that used a soldering gun to make a hot wire knife. "I've got one of those." I thought. Out to the garage. I removed the tip and added some 10 guage copper wire. We won't be able to do the whole bowl profile at once. But we can make many different wire loops that correspond to different parts of the bowl. It will take many passes. But it should work. We'll also need to make a moveable jig to connect the gun to the template accurately. Fingers are crossed. We'll report after next weekend.