Adam, I was surprised too. I'll flip through the Finch book tonight and tell you the page number. I think it was in the TIG section. I hear you about the welding classes. When I looked into it back when I lived in Oklahoma City, the Community College near where I lived offered welding classes. The instructor I spoke to on the phone told me it wasn't for "hobbyists" like me. I wonder if schools around here are more accomodating.

Doug, those are good prices. The Lincoln square wave machines I was looking at start at around $1500.