ok, one by one,

i m using on my old composite arf kit, and add some valves from HP-Tech Pumpen für Modellbau und UAV's and work perfect. must to add some valves at the cilinders....

about my mig main legs and wheel....work perfect. and fit perfect inside the fuse. really i spent weeks to find the perfect point, to find it, i had to open the 3 holes on the aluminum mounts at plywood fuse,
and make with smalls plywoods spacers..... as i told you, i used a carbon fiber 6mm tube crossing wheels axle, (be sure the legs has smalls screws so you can disasembled complete ,up down, spring. sicsors...
patience.......
check both legs must be paralel and like 4 o 5 degres to front.......
mount the aluminum mounts to the leg with some soft adhesive or tape or rubber bands... to keep legs and aluminum togheters.... now you has both legs parales with the carbon tube in betwens axle hole, slowly fit the aluminum mounts to plywood fuselage, and check holes with holes on plywood.... slow.... and check where you need to add some plywood ( 0.5 to 1 mm). you will find.....
as soon you arrive, fit at least one screw on each aluminum.
NOW... if you has this step done.... now you has to check if the wheels fit in the fuse..... for thats..... take out the carbon fiber tube , add the axles in each leg. slowwwww.... remember you has one screw and small plywood betwen plywood and alumiunm leg base......
as soon work..... add 5 minute epoxy with charge .. betwen the aluminm base and the plywood.......
add more screw..... done.......

sorry my englishouthamerican....... i hope you understand......

tomorrow will send photos about my work