extrudermount - v0.3

still a concept:
part of: http://www.thingiverse.com/thing:2011708
v0.3
release added, holes fitting
bearing space
v0.2
holes adapted, print tested
v0.1
Extruder for 1,75mm Filament
mounting on 20x20mm nut6 aluprofiles
on nema 17 Motors
with 608ZZ bearings

first ideas inspired by thing:275593

designed with RS Design Spark, rsdocs included