Funny coincidence. I did the this same thing today to an old beat up rip-cord. Mine had two broken spots in the crown where the pins used to be. Chucked it all up in the lathe, put it on a diet, turned down the body smooth and made a solder groove + weight ring ala-Neff. Plays a treat! Wanted to hold the thing together with a Bad armor (soda bottle) shrink wrap, but I'm short on plastic bottles and aint got no heat gun, so it's tape for now... I did try to to melt a misfit Gatorade bottle with a butane torch, but no luck. Actually much luck--I didn't burn myself or my house
I'd stuck one of these tips in a ripcord I gave to friend a while back but didn't have one for me self till today
Definitely big improvement--much more fun to play in my opinion.