Maybe talk with the guys at ADM. They used to make a saddle that fits G11s, but I don't see it on their website anymore.
I too had ADM equipment, but I stopped using the stuff. I have a Losmandy Dovetail to Vixen mounting saddle from ADM. I put a brand new OTA on the thing, double checked the mounting. All of sudden the scope just popped off and crashed into a tripod. The scope still works, but it's collimation is way off._grin
There are also numerous dents. It was a cheap scope, a Bressor 8in Newt, that I wanted to practice using a Newt and learn how to collimate a scope like that, as a learning tool.
The scope came with Vixen dovetail, so I don't think the weight of the scope had anything to do with accident. I have now had two different scopes fall off of a Vixen saddle. I stopped using the stuff.
Gregory Gig Harbor, WA.