The capacitive discharge battery tab welder (inspired by various web postings including ledhacks and the seminal philpem note) has been sort of on hold since I discovered the nominally 1.5F cap I bought measured at 0.3F. I had even made up suitable cables and hacked some wire and copper tubing into electrode blanks. But I was afraid the cap wouldn’t deliver enough energy to do much.
With the interest in battery rebuilding at Workshop 88, I was inspired to get things moving again, so I ordered another 2F cap. Someone had said he had good luck with a Volfenhag (which the new one is) and poor luck with Pyramid (which the old one is). I just got notification that it had shipped. Watch this space for news!