Found an article Squeeze More Accuracy by Glen Zediker in Guns Magazine describing the O-Ring modification, and more...EdgeOfEden wrote: Finally, if you are all about precision, a Lee Single Stage Classic Cast, would likely be my recommendation. Plus if you follow Glen Zediker's advice and remove the shell holder spring clip on the ram, you can replace it with a 7/8 o.d. x 11/16 i.d. x 3/32 thick O-Ring. This gives you a fully free floating shell plate. It works great. It's just a little slower getting the case in and out. With this mod I don't see how even the most expensive press can outperform it, but that's just my opinion.
Happy Hacking!