So I've been playing with Inventor Fusion, which I'm liking much better than SketchUp and 123D Design (and especially Blender), and I'm going to see if the stuff I want to make is "too small". 
Firstly I need to do something about the broken missile rack (unfortunately the peg came off inside a missile) 
And I'd like to have a clip-on Oleo Strut for the front landing gear. 
they should arrive in February, and if they're any good, I'll let you know!