So I bought a Lyman 4500 with heater for my new mold bought new so when I got it I had two problems one no handle and two no o-ring give a call to Lyman and they send me the parts. So I picked up the parts today happy as can be Take it down and set up the missing parts but I noticed one problem the O-ring will not screw on with without having to use pliers. Now I have taken the screw out and it is not bent at all there is nothing in the tube. I did notice this with the top cap also when I first got it but thought maybe the O-ring helped to fix it but it did not! I hope that this a my screw up I did something wrong as this being my first lube sizer don't know but if anyone can help please do. Sucks to buy something new and not have all the parts just makes you pissed to get the parts and find it still does not work! I was sent a new screw by Lyman but it still has the same problem it looks to me as if when the hole was being drilled it was not drilled right.