The wrap around spring does look like it would fail quickly, but it took over 100K rounds to break the first one. Think I'd replaced the zinc sleeve/collar thing twice by then. The sheetmetal eared washer piviots back and forth every time you take the measure on/off of a die and will eventually cause the sleeve to crack right there. I keep an extra collar and spring on hand just like I keep extra press parts and decapping pins. I like your adaptation and it looks like you could likely use an easily available spring from ACE. For other presses if you wanted to get fancy you could likely take a piece of 1-1/8" steel strapping, drill a 7/8" hole in it for the die and make a bend far enough away so the die lock nut will turn for an attachment hole. Or go a little thicker and thread it and put it above the lock nut if it doesn't clear the press.