A couple of years ago EBay was offering a small TIG welder made by Rand. As I recall, it was about 90-100 amps and was priced very reasonably. I thought it would work well for tightening actions. Unfortunatly it disappeared and appears to be no longer available.

Other welders are available for around $200, but are larger. I wish I'd bought the Rand. Prices have come down quite a bit in the last two years, dropping by about $100. I'm still debating if I really need one.

Regards
Ken

I prefer wood to plastic, leather to nylon, waxed cotton to Gore-Tex, and split bamboo to graphite.