I used the 'pro' pads on the back for a few weeks after getting the Rockman and they just got worse and worse. The bite was appalling and hold wasn't up it either. So i gave the pads a clean and completely cleaned the disk and they were still crap. Wapped the standard mono trials pads back in and straight out from new the standard pads were 10 times as bitey and had big hold.
Conclusion - Stick with the standard mono trial pads