Heavy duty - low cost welder - impressive heat capability.

These have been around for a few years. I have yet to find anybody who has used one.

I can see benefits over acetylene, but not over propane.

I saw one demo'ed once, it wasn't suitable for building anything, it was suitable for cutting up great big parts into scrap. The gal doing the demo used it on a 12 or 14 " end of a rubber mill roll, she cut a cylinder out of it and the piece dropped out onto the ground. But the quality of cut was very low and unsuitable for our use. This was in the mid 80's, so maybe they have made great improvement since that time, I don't know.

JTMcC.