Okay, so I finally got fed up and put 14 calipers on my 10R. They work great. I go to clean the pistons on the Nissin's today. And realize just how easy it was to push the pistons back in on the Nissin calipers. On the Tokico's pushing the pistons in was pretty difficult and I chewed up a set of pads doing it frequently. So now I am wondering if a lot of the braking problem with the Tokico calipers are because the tolerances are too tight for the pistons, seals and the piston hole itself. Hmm, I wonder is maybe polishing the pistons on the Tokico's just a bit would help?