I have two keller sights! I love it. I switched cause i have that problem of shooting to high or low from stand. I missed a huge 12pt one year, twice in a row, went high, went low, i was Mad[:@] he was over 25 wide, but not tall. Anyway... i have two keller sights, the first one i bought, had studs break off, but i welded stell rod in place of them, then i melted my screws, cause i didn' t know they were plastic,lol. I bought another, one, the new ones, it had harder studs, but.. i was getting vibrations from the pendulum, so i called and complained, he said all sights come with rubber kit now, to cure the problem, it did too, they sent me one for free, and some screws for my other sight. They were really good to me. Now, i have no problems!!!! oh, after i bought one, i sighted it in from a stand or elevated, then after that, i shot on ground to see what my distance was in lock postion. Then i shot a 11 pointer that year, it had a rough rack though, but still, i was happy. good hunting mike