Interesting idea Ron. I thought the idea of the rail was at least partly to stop spear wobble from the rear dropping -- so my first thought would have been to try it at the muzzle. Whatever works though.Ron Bakker said:
Some of the euroguns have a moveable guide (like a mini-rail) -- there was some advice posted last year onto where best to position it, but I can't recall what the advice was (not relevant to me - I have a full rail).