Fine thread and thanks for starting it. Most of the things are already said but I'd like to make few notions - as a modeler, not a designer (other than my scratch built work). Scalability is important and the fact that the graphics follow too. Downsizing is not that big issue but blurry lines when building big sucks. Instructions are not that important. I always like when a designer suggests the assembly order and numbers the parts as per sequensing. Photos of the beta build help too. I think that's sufficent in most of the cases.