i lucked out as mine balanced just fine. my battery was under the fuelk tank and the reciever was in the pocket in front of the wing and behind the tank.

the gear i used i had laying around in my shop for years. it is made by halico and i believe they are out of business. if you can make one then you will be able to make sure you have the clearance. good landing gear are not cheap and you don't want to spend the money only to find out you still don't have the clearance.

the blocks are 1/4 thick, 3/8 wide, and 1 inch long. they are in front of the servos and glue to the inside of the fuse even with the fuse side and fuse bottom. you don't want it to be sticking above it as the hatch needs to lay flush on the fuse bottom. it is just a block at the midpoint between the rear of the hatch cover and the landing gear. you also want to make sure they do not interfere with the movement of the servos.

mine was hanging down, so i added the blocks and put a screw through the hatch cover into the block to keep the hatch cover on the fuse instead of a little drooping. i will send you a very, very crude drawing that should help you understand what i did. i tried to attach it but it is too big.