If you'd like to mount your Multi-Reticule finderscope to a hinged OTA mounting ring, then the Stellarvue F2E is your answer. Custom machined at Stellarvue, the F2E utilized the pre-existing center hole found on most 1" wide hinged ring assemblies. Just attach the quick release dovetail foot to your Stellarvue F2 or F2-MRF Finderscope (sold separately). Install the shoe on one of your hinged rings. Install the foot with finder, tighten it in place and then align the finder and you're good to go! At the end of the observing evening, simply release the knob, slide off your finder with foot and store for future evenings of stargazing. (Does not fit Stellarvue F1001 Red Dot Finders.)
NOTE: Also fits Takahashi clamshell tube rings by removing the 1/4x20 stud in the clamshell and using the included 1/4x20 mounting screw that comes with the finder bracket.