I have been making some progress on this project. I am NOT an armor builder, and I have never before built a kit with rigid, individual track links.  I botched them pretty badly, but I'm hoping the tracks will not be the focal point of the build. 
I replaced the turret with a small "conning tower" structure made from the nose section of a 1/72 PB4Y. The catapult structure is basically complete, just needs supporting structure and compressed air piping. I have scratched an air compressor and tank, and have two barrels to carry fuel for the As 292s. 
Still to do: boom crane for lifting the As 292 to the catapult and building the As 292 themselves. 
I'm not happy with the tracks, but otherwise I'm liking where this is going. I start a 1.5 week trip tomorrow, so little work will be done before the 11th. 
Photos will follow shortly