I did have some changes on the large AZ wheel for range finding and there was quite a difference on the elevation settings going from 50X to 30X. I was using 50X from 30yds to 55 yds and 30X from 30 yds down to 10 yds. And, I had to do it all over again when I finally decided to change again to 35X. When I quit, the USFT was right on at 35X (1/2" KZ at all distances), but I had to use the mil-dots on the Nikko scope from 10 yds to 14 yds. for one revolution of the AZ elevation knob. Now I will work on screwing everything up in the FT positions and Mother Nature will throw in a few curves.
Pat