Now this should be an interesting one Mag!
Take it steady, as you've got 3 months in which to complete it, so no rushing with filling and sanding. Just make it nice mate!
I would hazard a guess that Lucky will probably be able to offer some help, as the Cat is one of his favourites. When it comes to markings and units for WW2 pacific Cats, I'm afraid I'm as much use as a concrete parachute, but there'll be people here who can help, I'm sure.
Looking forward to the build Mag!