I bought this as a replacement for the small saddle on my GM8 only to find that it's too big for the GM8 and the locking knob interferes with Gemini servo motor. Will fit a G11 perfectly though, and is drilled for a variety of others. Anyway, I have no choice but to sell this really nice quality William Optics saddle and matching dove tail plate assy. It is absolutely brand new with exception of fit check and looks it! A really nice and sturdy saddle. Dove tail fits most std tube rings as well as TeleVue singles. Selling pair for $100 (shipped) CONUS. Many thanks for consideration!