Great, I bought a Super Sportster with a K&B 61 on it and couldn't ever get it to run right. I had someone helping me and it just wouldn't run good a full speed, kept surging and not getting full power. Never did cut off and was able to bring it in both times but I couldn't figure it out. I gave up on it and converted over to a Saito 72. Still haven't flown it yet but hope to soon and would like to figure out the K&B. My Astro Hog has a Saito 72 on it too and seems to be plenty of power for me. I'm hoping to put some foats on the Hog once I get it flying regularly. I finished it about 6 mos ago and just now got it in the air. I was very nervous and would have liked it a little calmer, wind wise.