Started this thread in the reloading forum, my mistake. Nice rest for the $$$ but is lacking in the top rest dept, not sure why Caldwell didn't offer at least a larger top as an option but problem solved. The Sinclair RT-3 fits perfect with minor modifications, I believe this is being replaced by an updated version with a different return to battery post. The factory top has a raised mounting portion so a 1/8" piece of stock will be needed as a spacer to the flat-bottom RT-3. Needs to be cut to the same length as the movable portion on the rest. I only needed a 1/8" thick piece of aluminum stock and two 10-32x1" stainless screws in addition to the RT-3...screws need some blue loctite as well. Plan the mounting accordingly so the left thumbscrew clears the vertical height column at full left position, there is a cutaway in the rest under the thumbscrew and allows for easy access to the screw. May go with an Edgewood bag but had this curdura thinking it would work with the factory top, at least I know I can fit practically any top bag to it now.