MMU2 filament buffer and spool within an Ikea drybox 365+ 10.6liter, Version 4

This is a filament buffer and spool within an 'Ikea drybox 365+ 10.6 liter' for the MMU2s.

I wanted my filament-spool, but also the whole route to my MMU2, in a dry and protected environment. So I designed a buffer within the largest drybox of ikea:
https://www.ikea.com/nl/nl/p/ikea-365-voorraadpot-met-deksel-rechthoekig-kunststof-s79276760/

Required:
-4x Iglidur bearings GSM-1012-10 or similar. (https://www.igus.eu/product/1)
-7x M4x20mm tapered bolds and M4x2mm nuts
-grinding paper for the printed safts.
-double sided tape to mount the buffer in the ikea box.
-I used the PC4-M10 tube connector. Drill a hole of 9 mm in the ikea box and screw it in. (https://www.amazon.com/BIQU-Straight-Pneumatic-Connector-Extruder/dp/B01IB81IHG/ref=sr_1_3?dchild=1&keywords=pc4-m10&qid=1588878678&sr=8-3)

drawn in Rhino3D

This is the video of the first test of version 1: https://youtu.be/jPgZovy2vW0

Print instructions

Version 1:

• I needed to drill the holes in the pulley-wheels with 12mm. (I will change this in version 2)
• use grinding paper for the two printed axis.
• I drilled the output hole with 4mm, as the PFT tube needed to be slided more inwards. (See picture). (I will change this in version 2)

Version 2:

• changes above are included.
• recess made for the PC4-M10 tube connector.
• The filament route of version 2 is too big, due to a mistake of mine. This results in a hole in the print near the lowest pulley, which can block the filament when loading it by hand. I will change this in version 3 (V3).

Version 3:

• changes above are included.
• release holes for shafts included

Version 3b:

• rounding added near the upper pulley
• Rotation indicator holes included

Version 4:

• Filament Spool Skate added (as a separate file)