Questions I had about my upsidedown engine that put the carb. 1/2 inch below fuel tank are now moot as on it's 8th flight, my u-can-do lost the elevator and , of course crashed...two things I will do different on the next one....(1) ca both sides of hinges at the same time...I did it by applying ca one side at a time and that was wrong , I was told....Hinges swell when ca is applied and the WHOLE hinge absorbs the ca therefore the one side that's inthe wood swells, so all is o.k.....when one applies ca to the other side after sliding it in the wood, that part of the hinge has already swelled when hinge was inserted in the first side, so hinge is not properly attached to the wood because it didn't swell enough..it sounds logical to me...does anyone disagree with that?? When I picked up the pieces, I noted that the hinges were still in place on the stab side and that's the side that I applied ca to first...(2)...I was advised to cut away a small amount of the covering to expose the hinge slit, drill a hole in center, then apply ca with those little squeeze tubes and put the small nozzle into the hole, then squeeze to be sure the ca goes where it's suppose to go to do it's job...that also sounds logical to me...if I live long enough I may be able to do all these little things that are so important and be able to go thru a season without a crash........that would be nice!!!!