I am trying to put a centerpoint 4x16x40 onto my Gamo silent cat and need advice for a scope mount. My existing mount sits too low for the scope and I want to purchase a 1 piece scope mount. I found several on ebay, but was not sure what size the dovetail was on the gamo. Is it 3/8 or 11mm, or will either one work the same. Also, if anyone has advice where to buy a 1 piece scope mount at a reasonable price that information would be appreciated. Forgot to mention, the scope requires 1" rings.