Capt RKO, I see you have the tank drop pylons on your Han 9 P-51D. Have you used them yet? I have them on my Han 9 P-51D. But when I tried to fly with the tanks on the tanks would release when I start to throttle up. They both release at the exact same time. I feel the engine vibration is causing them to release. Have you (or anyone else) had this problem? I am thinking of adding a little foam between the pylon and the tank to see if that changes anything.