Didn't see this in my search. Pretty much every Model 65, including the dash 5 like mine, seems to have the old, classic fairly flat and symmetrical cylinder release or latch or whatever. Mine has one that is almost an elongated oval, like the newer guns of today. Is mine the only one with this this odd-shaped thumb button? Is it difficult to replace or hard to find the "correct" one? I didn't dig it out of the safe for pics as I'm pretty sure you all know what I'm describing. I can, if needed. It just seems out of place on that gun. Thanks!