earlier today i wrote this offlist and i think it's relevant:
brazing "may" be a science but frame-building is a technique.
overanalyzing might be the natural order of things, but if a
fred or a hank suggests that it's not prudent to do such-and-such,
perhaps disregard their attitude if it torks you off, but listen to
their message and learn a little from it. these guys are life-ers
and are trying to help you.