No-Drill No-Glue Cereal Box Spoolholder Insert V2

There are a ton of dryboxes out there already, but it seems that almost all of them check at least one of these boxes:

• Very expensive
• Very time-consuming to make
• Require drilling into or glueing onto a store-bought box
• Contain more than one spool
• Let the spool roll on it's edges

This model eliminates all of these drawbacks. And it's much less fiddly to use than V1!

Features

• Fits large or small spools up to about 200mm outer diameter and 67mm width with an inner diameter of 50mm. This should cover most 1kg-spools.
• No adjustments or adapters necessary at any point. If a spool fits, it fits.
• Less than 10€ for the whole thing.
• Total print time on the MK4 is about 7.5h with a speed profile or about 10h with a structural profile.
• Quick and easy to assemble.
• No holes or glue necessary. The cereal boxes stay fully complete and intact, so you can re-use them for something else later.
• For printing, you open only the smaller lid to expose the end of the filament. The compartment with the spool stays almost airtight.
• Indentations on the small sides of the spool holder can help to get the it back out of the box with a tool, just in case pulling on the PTFE connector doesn't work.
• Seems to work fine without an additional buffer, even though it doesn't have any dedicated buffer-parts.
• Fully printed, except for the cereal box and hygrometer!
• Somewhat modular

Required materials

• 1x This specific cereal box: https://www.amazon.de/gp/product/B0CPP5KGJ4 (Careful, there are many similar models with almost identical product pictures that have an indented grip area. These are too narrow for most spools and this model won't fit them!)
• ~100g of any filament (PLA works)
• ~60g of flexible filament (I've used 85A Extrudr TPU FLEX Semisoft, a little harder than 85A should also work. Don't use anything softer.)
• 1x rectangular hygrometer for 45x26mm hole (Optional. The product descriptions never seem to mention the correct hole dimensions. The product I've used says the back side is 48x28,6mm.)
• ~100g Silica gel (Optional, but recommended. Get the kind with a colour indicator, especially if you omit the hygrometer.)

Instructions

1. Print the parts. You will need:
   • 1x Main part
   • 10x Arm Pin
   • 1x Hygrometer holder (optional) 
   • 1x Label (optional, put your own text on it in PrusaSlicer)
   • 2x Arm (Must be TPU)
   • 1x PTFE Adapter (Must be TPU)
2. Assembly and usage should be quite intuitive.

Changelog

Current version: 2.0

• New: TPU clip-on arms
• New: Modularity
• Removed feature: Multiple orientations