Ha well, this is just another reason I believe that I will get back into taking apart and studying old scopes, and figuring out ways of repairing them myself, I just stiffened up a .22 cal rated 3x9 scope turrent adjusters inside with a pair of shims, so I don't expect them to move around now on my mossberg 500 shotgun when shooting slugs, I mean, I had to take apart a pu scope for instance, and it wasn't exactly an easy screw apart with some mechanical sense and an electric heat gun, but the whole holding zero thing is likely easily fixed on most scopes with spring washers or those made from other spring washers, shims, and the nitrogen moisture evacuation thing, all for "vintage or collectible" scopes, unlike Leupold for instance that still services scopes. Making reticles, I can full well see how this is done, I think most folks could really sit down on a clean work table and do scope work, but of course, I've had a few apart, I've done some binocular work as well, no choice, like once I put a similar prisim from a bushnell 10x50 into a ww2 german binoculars that had its own busted, placed it in there under the strap, glued it in, it works, could have fiddled with it to be perfect, but perfect enough, it aint hard.
Ya know, I got a book on opthalmology, the talk of focus length, lense grinding, etc, maybe what would be real hard is have a vintage scope that has a busted lense and have to figure out the lense replacement for order. But like I've said, I guess I like to take things apart, so I guess this whole scope home servicing is a little over the head of some folks, not like I'm all motivated, just plenty of years with lack of money, I mean, have a busted or fogged up scope, errr, it was time to repair it myself, except for that ultra cheap chinese spotting scope I had to return one time, it was all a glued up affair and allowing water inside, bogus.
