Bob
The erector tube in a Weaver ismounted backwards. In other words, the gimple joint is on the objective side, and the lens assy is on the eye piece side.
When looking from the objective end, what you see is actual gimble assy. It has a nut that forms one sperical shoulder of the joint, and the other shoulder is contained in the tube that is held in by those two small screws under the turrets.
As for the eyepiece end, the first thing you encounteris the nut that you must remove to get the eye piece bell, off, then that "freeze plug" locking device, then the actual reticle assy, which screws in. This assy has two small spanner slots for removal.
The reticle assy is two pieces, held together by two tiny screws.
In order to freeze the erector tube, I would machine the erector tube gimble ball straight, leaving a small shoulder. This allowed me to JB Weld a aluminum ring onto it to center it in the scope tube. The eye piece, or lens end, required no machining, (it is straight), only a aluminum ring JB Welded in place.
After the rings set, I then JB Welded the entire assy into the scope body, being carefull to get the erector tube in exactly the same position, (length wise), as before. This is criticle. I then blanked the turret holes.
This is a lot of work, but I found it to be the best way to freeze the erector tube, while discarding a bunch of unused parts........jackie