I'm here at the TX Biggie, just got back after practice all day. I ran a Rex RER with a BRB and his new crankshaft. The engine performed really well! I was surprised to find that I had to increase the 1st gear and 2nd gear to suit the power of the motor. Late in practice I decided to try Edward's Rex with his Bi-metal sleeve that he was kind enough to send to me for this race. OH MY GOD!!! This thing is unbelievable!! It's the fastest engine I've ever ran. It has crazy bottom end! It shot me past every corner until I got used to it. I'm running the tallest 1st and 2nd gear my RRR has and it's still asking for more. I can't wait to run it more tomorrow. I'm sorry Edward, but I accidentally spilled some JBweld on the motor mounts so I'm afraid it'll have to stay in my car