been watching you guys talk about the different optics available for shotguns i have a 935 mossberg with the tru glo red dot that came with it just aint cutting it sits kinda high and brightness knob is getting alot of play, want a new one thought either the ff ll , mueller, or the nikon turkey pro <was'nt sure about the eye relief ...any suggestions or disadvantages to either?... and would i have to buy a new mount...? have a rail on there now with that red dot clamped on it...