A badly worn or bubbaed 61 might be fun to customize, all right. But a nice one is just too nice a gun to mess with, IMO--the thing just about defines "ergonomics"!

Different sights, sure, especially if your eyes are going south, like mine.

RWTF, the 61M was a great IDEA! But I've never found one that shoots as well as I'd like it to. My present one shoots .22WRF pretty well. .22WRM not so well, and I've tried all the foreign and domestic makes and models, including pricey German RWS, and CA "Green" unleaded. I keep it because it's so pretty.