Hey Todd, put one of those belts away, they both take the same belt. Least I have only been using one ... the other is hanging on the garage wall.
Yea, the manual says 3 suitcase weights. That's about 124 lbs plus the weight of the weight bracket, which I understand is pretty beefy itself... probably talking 150 lbs or more.
My tractor is a little scary with the roller on and without the weights. I do have rear wheel weights on and have 0 slippage, I suppose that could be the difference.