I have both planes now. I bought the DP Extra 2nd hand in excellent condition with a ZDZ 40 RV on it. Very little time on both the motor and airframe. It is what convinced me to buy a gasser for my patty. My only concern is that the DP Extra with the ZDZ 40 on it weighs more than the GP Extra with an MDS 2.18. My BME 50 should be here Thursday morning so that I can set it up and get a more accurate weight. I couldn't do much more than deadstick the patty with the MDS. I am really anxious to get the BME hooked up!