I mounted the retract into the same location of the original, but I cutted the bottom sheeting to accommodate the retract.
My first plan was to use a pair of 3 inch robart wheels, but the ribs near the center of the wing (the no. 2) did not permit this setup.
the only way is cut about 4 mm of the leg.
these are designed for TF p-47: they dont fit so good on the wing due to the offset. I red the TF p-47 manual, and I found that you need cut the recess for gear support to be flush with the wing.
the shape of the wheel bay is near to scale. probably I'll sobstitute the cj legs with a pair of straight ones to have also operational inner doors.

about the fuel tank setup: I installed it with a lot of foam. this metod works good for me. did you have a fail or something else?

I have a doubt about the offset of the engine. the manual does not speak about it to compensate the engine torque. I'm working on a mix with my radio to do that.

Alessandro