I got the scope yesterday and took it to a friends house in order mount it and level it. we were getting close to dark and I forgot about how you zero these. I picked the scope up second hand from a member here and it was in really good condition. I checked to see if he had the zero stop set and he did. When I got to buddy's I checked the zero stop again and it was gone. I didn't twist beyond the resistance the first time but it was no longer there. I figured maybe the previous owner did have the set screws twisted tight. So I had a little day light left and I started to zero the scope like you would with a PST. The when it was dark and I finally had it zeroed it dawned on me you don't zero the Razors like the PST. So I figured I could pull off the turret and set the zero stop and when I could get to the range again set the zero stop like the instruction say. When we went to tighten the zero stop it would still spin, it would not lock. Is there something internally wrong or am I doing something jacked up? I am going to go to the range tomorrow after noon and try zero it like I should have the first time but I don't know how I should go about it now as I can't seem to find where it locks at. Any suggestions?