OK. I've now got my hands on a bare Bridgeport J-head. It looks pretty cheap and cheerful and it's clearly 'seen a bit of action' in its time, but there don't appear to be any major horrors as per the recent advice I received on this N.G. Before I strip it to see what lesser problems need sorting I thought I'd give it a good workout under bench power to find all the rough edges. I don't have a manual, so are there any do's and don'ts regarding switching the various feed and drive options under power? Can I switch to/from backgear under power for instance, or engage or change power feed settings under power? Basically I want to be able to run the spindle and try all the various options and combinations to find any glitches, but I don't want to strip any gears or pins out of ignorance.
Cheers,
-Neil F.