Spool buffer Hartpa 2

Spool buffer Hartpa V2
The purpose of the device is to reverse the loose filament when printing a 3D printer of Pruša MMU. It prevents the filaments of different colors from tangled.
Parts List:
Printed parts (PLA)
1 Spine 1 pc
2 Arm 1 pc
3 Frame 1 pc
4 SpoolHolder 1 pc
5 Nut 1 pc
6 Router 1 pc
Part made of sheet steel
7 BearingBase 2 pcs
Finished parts
8 Ball Bearing 8/22x7 4 pcs
9 Screw M8 x 60 2 pcs
10 Washer for M8 4 pcs
11 Nut M8 Low 2 pcs
12 Rubber Booties, self-adhesive 4 pcs
13 Bolt M10 x 22 (weight) 1 pc
14 Nut M10 (weight) 1 pc
Assembly notes
A. Deep Groove ball bearings (8) in the Spine (1) and to Arm (2).
B. Pull the screw (9) through the spin bearings, insert the washer (10), screw It Into BearinBase (7), pull over the hole in the Frame (2) insert the washer (10) and tighten the nut (11). The nut (11) acts as a contramator against BearingBase (7). The axial clearance must remain so that the Spiner (1) rotates slightly.
C.