Yeah, i did too, i manipulated the tank fittings so the pipes dont intefere with the servo.

Hard to explain, but ill try. My tanks are in series. The vent pipe is on the right side feeding out. The pipe connecting the two, comes out the tank and loops in front of the servo, then goes back to the other tank. The feed pipe, goes on the left side of the servo. If i was to remove the nosewheel servo tray, i have to disconnect the pipe.

My stingray came out at 14lbs with the UAT full, and a probably half on one tank of fuel. Keeping the CG far enough aft was a problem, possibly exacerbated by my heavy building. I ended up putting my reciever pack beside the fuel tank touching the rear former, hence on the cg.