I have had some trouble with accuracy with red dot sights. I was a marksman in the TA and never had any bother untill now, fair enough I fire an SMK B2 but have moded it slightly so of a bench stand its fairly accurate (2cm at worst group at 10y). Any way I made my self some crosshairs to fit inside the sun shade on the scope to line the dot and hairs up while firing to try and reduce paralax. I got the idea after hearing about the accucover, I havent had chance to test it yet. Has any one else done anything similar?