I am posting my version of a filament dry box. It can be printed for 2 or more spools. I have used a few parts from different designers, I will list them below for credit. If making the spool holder for 4 or more spools use a single metal rod to go through all parts.

Each 2 spool section will require a box with a length and width of 16cm x 20cm minimum. I used a 24L Sterilite box from walmart/homedepot but should work with most brands types. The new BOWDEN_EXIT file has just enough room to fit a 1.75mm bowden tube inside.

For every 2 spool section you will need:

• 1pc dry box base
• 4pc dry box rollers
• 8pc roller rings
• 2pc bowden Exit
• 8pc 608 bearings
• 2pc metal rods approximately 4.7 to 5mm diameter

Optional prints

• Silica Basket (holds 3 50g silica gel packets)
• Rod endcaps (not to damage the plastic box from sharp metal rods)

Other FYI

• Bowden exit tube part is attached with M3 screws and nuts
• Silica Basket is attached with M4 screws and nuts

dry box roller unchanged from
https://www.thingiverse.com/thing:3320749

Bowden tube exit modified from
https://www.thingiverse.com/thing:961881/files

Roller Rings modified from
https://www.thingiverse.com/thing:3598258

This is the first time I am posting files I remixed/borrowed, I apologize if I did it wrong.