I have the DX7, AR7000, I'm using Elev and Aux2 channel, and one servo is on top of the other. I think I got it. Its pretty close. It's mechanically centered. for some reason I can't get the Travel Adjust end points to work correctly. everytime I mess with the end points the centering goes off at center stick. anyway, I mechanically setted the whole thing. I'm using the Dubro High strength JR servo horn (almost white) and instead of the 3rd hole I went to the 4th hole and that got the distance almost equal - very close. I put the servo arm (eyeballed) at equal position from center. adjusted the length of the push rod assembly so that each elevator is (I believe) centered. and used the control throws in the manual. I setted the Low Rate to 35mm and the High at 55mm (the manual saids 70mm but I'm not planning to do any suicidal manuevers). By setting those throws the elevator meets really close at the top and bottom for both Low and High. It's off by 2mm. Going past 70mm (max throw - and that was what I was seeing) the elevators were off by as much as 5 -6mm. I'm using the DS821's on the Elevator and Ailerons and HS-5625 on the rudder - is that enough for this plane. Also, using the Low Rate control throws that the manual gives - is that ok for easy flying? I put 40% expo to soften the center. I haven't mounted the fuel tank yet. I ended up buying a dubro 12oz tank (something a little larger). should I build a mount/bridge from where the fuel tank normaly ends to the spar and mount the fuel tank far back as possible? Or 12 oz. no issue for stock location? that was my biggest worry - the fuel tank sits so far up forward with the stock tank. I figure when the tank gets close to empty the plane will be significantly tail heavy - must be a tail heavy landing. Final question: Does the plane float pretty good for a landing? I'm going to install an OS FS 91 w/ pump and stock muffler. Lipo 3s 1200mAh to lower the weight w/ regulator.