The Lyman 450 has two large pins that hold the handle and ram together. On the attached photo you can see that the pins have a head on one end and are held in place by small cotter pins on the other side. However, my 450, which was apparently made around 1970 and came to me used, has pins with no provision for a cotter pin. So, the pins tend to work themselves loose every few minutes. It's not a big deal, but it is sort of annoying. I can think of several ways to solve the problem: drill holes and insert cotter pins or split rings, thread the pins for lock nuts, cut grooves for E or C retaining rings, etc. Just thought I'd ask for any simple solutions. I am not a machinist, but do have access to a drill press and lots of files. Thanks