Yep, that has happened. Funny thing: my first Lee six-cavity was a used Fattest 30 and part of my Lee-menting process was installing a set screw, for the sprue cutter cam to ride on. However, I forgot to do it on this mould.lot of times the aluminum will groove where the cam rides.
To follow up on my last sentence: I've installed a set screw and the Lee-menting is now complete.Ben has a hard-surface fix for that.