Prusa MK4 Triple Spool Holder

Prusa MK4 Triple Spool Holder remix.

Hardware that I used in my setup:

1. Linear Motion Rod Shaft Guide
2. 608 2RS Ball Bearings

The front rod location with bearings in place was messing with the extruder in the top Z-axis position preventing it from moving on the X-axis. Moved the axis of the rod's holes a bit deeper. 

Rods are not fixed from the inside, so both rod holders could move inside. I was thinking about how to fix it (maybe by extending a hole from the other side and making a surface there to screw it on) but didn't figure out a way with it printing without a lot of support and keeping the outside surface flat.

Update v2:

Railholders were upgraded since they were obstructing the movement in the top Z position. Also in print files (g-codes), the modifiers were added to enforce the hook part (100% infill) since 2mm of the surface was removed.

Tried printing the original model but realized that it would not fit to MK4 to fully hold 3 spools.

Differences:

• Uses 300mm rods
• Rod holes do not have stopping points
• Uses caps on the end to cover rod ends
• Added bearing spacers
• Mounts on the extended part of the printer frame