Either you guys are lucky, or my stuff is junk. Its probably my stuff.
I would get the firing gap just where I wanted it, and the armature would either slip backwards down the ramp face just when I touched the AA unit, if not then certainly when I tried to tighten it.
So of course I tried to trick it by deliberately setting it to advanced or retarded, always turned out too advanced or retarded.
The little pair of vice grips really helped me out here.
Also this was a brand new repop AA unit. The taper only had two settings, too loose, or too tight to turn the points plate by hand.
I will let you guys know how the AA unit turns out. At least it fit in the space provided,
Lee