Makergear M2 Filament Drive with Shrouds V3B Hotend

Working great on my M2 so far :)
Dial indicator mount added- drawn for the harbor freight dial indicator.

Please note that the filament path can print tight on these, causing dragging. You will need to manually run some filament through the filament drive until it is smooth. I had binding initially, but that should cure it.

This set is designed to ideally be used with slipshine's m2 printer spool holder, thing 37210 but should work with the factory tube.
It is also designed to be used with the V3b Hotend as well as two 40mm fans. This set will NOT fit the 50mm bed fan.

I have made small changes to the factory M2 Filament drive including:
Notch for gear inspection and cleaning
Dovetails for shroud mounting
Adjusted for easier inserting of V3b hotend
Smoother filament opening for less initial binding
Smoother filament path
Slightly enlarged top filament hole for easier color swap
Slightly enlarged nut traps

The shrouds are designed to be quick on/off and to help cool the barrel of the hotend without excessive air on the melt zone (hopefully requiring less retraction).

Thanks for Mrcleanr6 and his nice dovetailed-drive which inspired mine. http://www.thingiverse.com/thing:344950

I hope to soon incorporate a similar path as the drive designed by
cas00176 http://www.thingiverse.com/thing:717414
For work with flexible filament.