Bearing block for 5mm shaft, bearings at 120 degrees, rot 60degrees ver.2

changes:
・ Added stay fixed by M3 x 2.
And the rotation of the M3 nut is locked with the body.
・ The direction of the bearing was rotated 60 degrees.
・ Reinforced the holes in the M4 nut that holds the bearings.

ver.1 here
http://www.thingiverse.com/thing:2099069