I have 2 KMs. The Purple one has HiMax 2025 5300. Cobri geared 6.9:1. 12x6sf prop. Pulls 29amps. The Red one has HiMax 2025 4200. Cobri geared 6.1:1. 12x6sf prop. Pulls 23amps. I used to have the CF gearbox and blue shark motor from PA on the red one ("The Red One" video below uses the CF geared setup setup). But I over propped it and toasted the motor. I also have a bad habit of "dirt-flirting" and I kept bending the shaft on the CF gear-box. It's a really light set-up but the shaft is pretty soft.

Video of the Purple one is here: http://www.atlantahobby.com/shopexd.asp?id=5969

No-frills video of the Red one is here: http://s58.yousendit.com/d.aspx?id=2...I0LXUNPDYZNY33

I love this plane. Strong. Light. Suits my flying style just right. -Fred