About this 3D model

Before I never upload it, here is a ever-lasting work-in-progress. Idea 2009, first frame from Shapeways 2010, finaly made one for FDM this year. Seems like nothing new these days, but back then it was :-) I completely changed the frame, and it is completely screw-/glue-/tape-less!!!1!!11!1!!!one!!! Print, clip in components, fly. Crash, clip in components, fly. ROBUST!