Hey guys,
by now there are already several micro quad reference builds for the autoquad M4, nevertheless I thought I would share my personal 3D printed one: YamQ (Yet Another Micro Quad): Brushed Micro Quad for Autoquad M4
Its designed in SolidWorks and inspired by several others on Thingiverse.
I'm using the free Quatos version and it flies extreamly stable + its great for annoying everyone in the office