For those with the EGW base/mount for this pistol, which of their offerings is the correct one? I did the measurements on my .243 that are needed to select the right one, but neither the v2 base, or the centerfire base, match. What am I missing here? Is there a another base that is specific to the v2 pistol that I haven't found yet? I need the same base for a 6.5 Creedmoor, and a .300 Blackout, too