Yeah think that! you don't have level anything after the base. So when you go for snack and the you come back and they trimmed 5 digrees you still run rest of the lifts in and it won't look like a ski slope on every lift. My mate still goes on about tube and fit!
I've never worked on a sub,but done plenty of planes and it was always tube n fit,all ali though,nowadays they have ready made jigs they just wheel into place
I have done a few in cup lock and loads in tube but the new firm I work for insist on using easy fix transums. And they just won't buy the swivel jacks for cup lock!
basic dont sound very nice ( but its true aint it it all starts wiv a square well oblone sort ov shape!!! and i spose im so used to using a tape i dont see it as takin any longer..