Today I put the HK flip up rear sight on my 762 and went to the range. This quickly became a frustrating experience. I had pre-sighted it in with a laser bore sighter and the first shot was close to dead on. Then the 2nd and third shots missed the paper entirely. When I started trouble shooting this, I realized that the thumb adjustment wheel for windage was out (pulled out as when adjusting). I assumed I had accidentally did this and I pushed it back into place. Next shot fine; the one after off the paper. I take another look and again the damn thing is protruding out. To make a long story short, the recoil on EVERY shot moved the blade/post to the right (when looking towards the target). It's not very much fun having to push it back into place after every shot. I cannot imagine this is a design flaw, what am I missing? Has anyone else had this issue? (At $260, PLEASE tell me I am doing something wrong.) Anyone else had this issue?