Direct drive Wade extruder for Raldrich planetary gearbox

I recenlty made a copy of Raldrich Planetary NEMA17 FIXED gearbox (http://www.thingiverse.com/make:149197), while it works as expected I found that M5 bolt sits loose, so it won't deliver good grip on MK8 drive gear when used with Airtripper extruder. So I decided to reinvent the wheel once again and design an extruder to use with that gearbox.

Not tested yet, will see how good it is.