Originally Posted by
unterhausen
Where is the laser?
The theme of my new chainstay fixture is "everything is round if all you have (working) is a lathe"
That should work. My approach is to rely on the laser and try to make everything else adjustable. So the things that hold the ST and HT are based on kind of dropouts. This means I can file one side or the other if things are not perfectly square, or even in theory offset the BB fixture in the dropouts a little bit if the BB shell is not quite square to the ST (cue arguments about how to align frames but the reality is that on a TIG frame that ST/BB joint is not going to change its angle after it's welded-- all you will do is put a bow in the ST if you try to correct it).
The laser is off to the right on a little adjustable stand type thing:
