MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.
No-supports head has a remix:https://www.thingiverse.com/thing:3238766
As for posing the dragon, it is designed so you can run a fishing line, string, or piece of elastic cord through. If your joints are fitting too loosely, my bets (at this point, I haven't tried fitting mine together yet, so I'll admit I'm entirely theoretical right now) would be either to print ball joints with tighter tolerances, (either by using the lower tolerance ball file or making the one you're using 1 or 2% bigger), or use the elastic cord (cotton string can work well, but you have to keep a good tension on it to keep the dragon posable). Another option is to string it with copper wire instead of elastic cord.