I was wondering if using exponential on the throttle servo would be a way to even out the throttle curve on the DLE 20. I have the same problem with my SBACH 342 Profile and DLE 20. I am basically WOT at 50% stick. From 50% to WOT there is little RPM change. Frustrating! Since I am new to RC gas engines I can only conclude that the carbs are the problem, (since I've always driven cars with carburetors and adjusting was only a matter of getting the air/gas/idle mix right). Is there an aftermarket carb that works for these?