I can't offer any insight on the commercially available ones, but when I get back to Wisconsin I will put the one I made in a box so it does not look like a bunch of wires and such. I can put in an 18ga nichrome wire tip and melt an aluminum can with it, I made my own pens and replaceable tips for one and the other is for just wire that I cut and manipulate into what ever tip I need. So far I have just played with it getting the adjustments correct with different tips and wire sizes. But when it is all done it should fit in a 5"x3"x8" box, then maybe I will spill the beans on how I make it!
Good luck with your purchase,
Jeff
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