I found an old Rockwell 115V band saw blade welder in the shop and turned it on and it didn't work. I opened it up, cleaned the connections and reconnected a loose wire. I also cleaned the clamp jaws. Put it back together and it worked. However, I have serious doubts about how safe this thing is since, like a lot of old tools, it doesn't seem very well insulated, AND I suspect it could pack more of a punch electrically than an old hand drill. Anyone, with any experience with these old welders, care to comment on the safety of this machine? What safety measures should I take when using it? Would I be better off purchasing a newer machine that would, presumably, be safer?