Are you looking for a universal F2 mounting base system? The Stellarvue F2F Dovetail Stalk and Shoe is your answer. This package includes a large dovetail shoe that mounts to the Feather Touch 2.5" - 3.5" focusers (not the 2" Crayford) and the top of a Stellarvue clamshell. It includes a dovetail shoe and an aluminum stalk that has the dovetail groove for Multi-Reticle finder scopes (sold separately). But you're in luck! The Stellarvue F2F Dovetail Stalk and Shoe will also mount atop the Tele Vue clamshell providing the purchaser with even more flexibility. The shoe will work with both Stellarvue finders as well - allowing you to move your finder from telescope to telescope with ease! Does not fit Stellarvue F1001 Red Dot Finder.