Ran some of my home brew today. Ran as well as the 15% at the local hobbyshop. I'm probably down 500 or so rpm's since no nitro but with a OS .91 four stroke on a Twist .40, it's managable. Actually it's just sick, it hovers at about 1/3 throttle and at half throttle, it's pretty dang fast...... No need for full throttle.