Prusa USS Drybox Spool Holder for MK3/MK3S+ / MK4/MK4S

Fully 3D printable spool holder acting as a universal adapter. It allows the use of the USS Drybox and the original spool holder system from the new Prusa Core One+ / L on Prusa MK series printers (MK3S+, MK4). An ideal solution for owners of multiple Prusa generations

Universal design: Compatible with one or two pucks.

Asembly

• Print the Puck Holder for MK series.

• Also, print the bottom MK Mount for frame attachment

To assemble the Puck Holder, you will also need:

• M4x20 hex socket head screw - 2pc

• M4 square nut - 2pc

Print MK Mount

• PetG

• 0,2mm structrutal

• 25% infill

• 5 perimeters

Print Puck Holder

• PetG

• 0,2mm structural

• 3 perimeters

• 20% infill

• 10 top and bottom solid layers.

Insert the first square nut and lightly tighten the screw. The square nut slot has sufficient tolerance and is loose enough to accommodate both 2 mm and 2.2 mm versions.

Insert the second square nut and lightly tighten the screw

I used the remixed puck and spool holder from my other model on Printables.

To assemble the version with a single universal puck, you will need M4x16 screws (and optionally an M3x10 extended nut for the subsequent installation of a second universal puck.)

I recommend pre-threading the holes with a screw to a maximum depth of 10 mm.

Optionally insert an extended nut; it is not required for the version with a single puck holder.

Assemble the parts according to the photo.

Tighten the bottom M4*20 screws.

Print the universal spool holder for USS Drabox; this version features a stronger grip for easier installation. It can also be used for CoreOne+/L, as it is universal and compatible.

To assemble the version with two universal pucks, you will need the previously optional M3x10 extended nut, which is already installed.

..and the following screws: 

• m3*16

• M4*8 2pc

• M4/M3 large diameter washer

Optionally, you can reinforce the model with an additional M3x12 screw and a washer.