Well, I'm starting to see some of the limits on this bike. First, the bottom bracket (okay, then bash plate) is low and prone to strikes. I've cracked mine already and crushed the speed sensor wires on the back (it's all good now). I've also reached the performance limits of the Tektro 4-piston brakes. I've just swapped out the front pads with metallic and just ordered the 220mm rotors from Magura (MDR-P)... that should provide a boost in stopping power and heat dissipation (I've only done the front because most of the brake forces come from the front... my rear brakes have haven't faded yet). I followed a couple of really good riders on YT Decoys yesterday on some really gnarly trail and had to ride near 90% just to keep up. I think once I've sorted out the braking and get more comfortable on this bike (I've taken it to the jump park just to get a feel of it in the air), I hope to maintain the same speed but lower my margin to 80%. =P