Good the hear all the positives on the ASP. Just like the Magnums, read so many negatives, but the ones I have run very good.  One thing I did have an issue with, and thankfully caught it on the ground. The screw for the throttle barrel came loose on the 52.  I was adjusting the servo and noticed it ran sloppy, then as I looked I saw the throttle barrel bouncing around, and said, now that's not right. Stopped the engine sn found the loose screw. Put a drop of loctite on it, snugged it up, and its been fine ever since.