I am getting about 6300rpm with a 24x10 CF prop, premium gas, and Redline 40:1. I have used about four gallons and it seems to be waking up. It does have a lot of power and now that I replaced the ignition, it runs great. The original ignition was causing dead sticks on almost every flight, lots of close calls. I have it in a AW Ultimate.

Here is a short video of the engine running.
http://www.youtube.com/watch?v=UCtCj44Aw-A