Ah I misread your post earlier for some reason I thought you wanted to have the windage moved around because your lefty.
Damn cell phones make it hard to read sometimes hahah.
As for USO glass quality I have no idea I am going to go look at one soon.
I would think for the price its on par with the zeiss and swaros but probably not the zeiss hensoldt.
Glass is something thats very individual based when you talk about scopes in the same price range.
I recently posted a thread on here about the sn-3 there was only one guy who replied I think his name was Jackel could try to PM him about that.
And I dont know of any one whos moved the ejector I can see why your gunsmith is not crazy about doing it ones you start modifying stuff like that its up in the air what could happen to your gun.