After carefully threading the two bolts in as you suggested, the focus knob could still turn 3-4 times in each direction before encountering any resistance. This really makes it impossible to get a quick fix since you would have to gauge where to put the bolts in so you could achieve correct resistance at 3-4 turns. I guess I could make custom bolts of variable length that would only thread into the second set of threads. It's a tricky endeavor since it depends on the focus position. Simplistically, I just need some bolts that are a little longer, like a half inch or so. I'm really not inclined to open my scope up since I don't trust myself to get into something like that.
Quite surprised to hear this Randy - tbh I never tried turning the primary knob once I'd put the bolts in for fear of doing damage: is this 3-4 turns either way or 3-4 turns clockwise & then back again..?
I ask this because of the way the primary adjuster thread is fixed into that particular arm of the mirror supports...
I didn't want to go back inside the scope either & why I chose JB Weld to cement the guide blocks onto the back of the scope "around" the rear thread-holes as in the pik I posted...I consider this approach a bit "sloppy" tbh but looking at it after cosmetics it looks pretty nice regardless...& I have no intention of selling the scope - although I don't think it would be any buyer's issues.
On their effectiveness I can give the because they got their first light this morning...we collimated on Altair low in the West, swung halfway across the sky to lambda Aqu. & found imperceptible differences in star-pattern...another move to one of the small stars near Uranus later was similar although I want some better seeing to really qualify these results a bit better...
Here's a way to permanently fix mirror shift, mirror flop, mirror anything.
That would fix just about everything Rolo - & permanently!!!