On the Ringmaster Delux. When I got into the flight trimming, the biggest issue was turning tighter insides than outsides. So I drooped the elevator, and then drooped it 2 more times till it was 6~8° down with flaps level. Somewhat better but still tighter insides. It looked so odd I went back to neutral elevator and decided to live with and get used to the tighter insides. Then one day after playing around with pipe adjustments, I decided to pull the pipe and make a couple of flights on muffler just for a reference. Guess what, now inside / outside turn rates are nearly the same. So I'm thinking the pipe hanging under the wing was blocking or disturbing the airflow which made the down elevator less effective than up elevator, so much so that the normal drooping which should have corrected it, did not in this case. Was wondering if you experienced this with either of you two RMD's ? I have been flying without the pipe since discovering this, because that AT-36 has plenty enough guts for this plane on the muffler.