Has anyone used the ride on tire balancing goop? I just put on my roctanes and I had Rocky Mtn. mount them with the ride on stuff inside. Today when I went for a spin (granted it had been sitting in the garage for a week) there was a definite out of balance/flat spot shake coming from one of the rear wheels it felt like. After about a mile or so it went away. Initially I suspected the tires, but being 8 ply radials with 10psi they shouldn't have gotten a flat spot...or at least I didn't think so. Not a huge deal as it went away, just wondered if anyone else had experienced the same.