Reality check. It looks to me as if you are working very hard to avoid mounting a hammer spur. Here's a thought:well I made a paper cutout of the fx2 today and used it and a ruler to see where it would mount on the gun. Looks like I could do it with a scout mount, but at that point I would have several inches of scope rail out in front of the scope, and a fixed 2.5x mounted that far forward might as well be a scout scope.
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I once lent my 336C with a 2.5x scout scope on it to a lady (who is a good marksman). It is my best rifle and dead on accurate. She was also cross-eye dominant. Her answer to the problem was to mash her face into the stock and look out of the corner of her strong eye through the scope. Her 50 yard groups were huge (6-8" or more!) and it took her probably a full 1/2 minute to smash her face against the stock to get off the shot. It hurt me to watch her.I've tried the scout scope on another gun with a cheap scope. It works pretty well, but I shoot left and I'm right eye dominant t so the both eyes open thing doesn't work real well for me and 1 eye gives a pretty small field of view.
Reality check. It looks to me as if you are working very hard to avoid mounting a hammer spur. Here's a thought:
Get a Weaver or other standard scope mount. Then get some low rings and mount the 2.5x20 where it is comfortable to shoot. Install the hammer spur and be happy.