Streamlining the exchange of models that use unofficial parts

[Tim Gould]

This is why I think it's important to get the positioning and angle right quickly. Ideally I'd like a mid-stage where you have these approved even with a crappy design.

A part that looks wrong can be used and then fixed later, one that has the wrong orientation (eg. the early version of the 1x1x2/3 slope) can cause big problems.