I'm trying to build a nichrome wire glass bottle cutter for my bench power supply (BPS); I make candles, so for bottle candles. I've been looking for a couple of days and a user here had the answer about using the BPS & nichrome wire for making a foam cutter. I wanted to thank him/her. I've been studying physics with Dr. Dennis Polis for seven years, he has a Ph.D. in physics from the University of Notre Dame (early 60's) and we're both Christians so it's been really great. LOVE SCIENCE!