Surfing the web I came across a BSA adjustable scope ring. It works by using 3 spacers between the ring and the clamp. A bolt through the rings,the spacers and the clamp unit. I guess you can use 1,2 or all 3 spacers to adjust height of the scope. Does anyone use this system or know the thickness of the spacers? Thanks for any help http://www.opticsplanet.com/bsa-optics- ... ystem.html

Saikatana