Vulcaneer,
I did a little measurements between the roller and the slot cam. I have between .070" and .125" depending on where I take the measurement. This is with a new roller which is .005" larger than the old one. The hitch is a couple years old and has about 6,000 miles on it. I do not see any mushrooming on the cam slot metal. The feeling when driving is a sudden loss of trailer weight for a split second and then a loud bang. I will try to tape my camera to the tool box and get a good video of it. Pullrite and my manual said to set the turn table nut so the turn table has a lot of resistence. The tech said is should be very hard to turn off the cam and it is. Thanks for your reply.