Anybody have exp with these? I bought one off ebay back in the summer, brand new. Put it on my xbow last week and left to right adjustment is fine, bu t i can not for the life of me get it to go up. I have the dial cranked up to the point its almost to the max and it is still 5 inches low at a whopping 10 yds. It is mounted leve and everything looks fine. Problem is i can't find the receipt of the person i bought it from
