INBXX Passive rear storage for Double cabinet

Created three brackets for the Double INDXX cabinet to store up to 6-1kg spools of filament.  All total the cabinet can hold 14-1 kg spools in this configuration.  Plan to place this cabinet under a Core One INDX conversion, once they are more readily available (didn't opt for the Founder's Edition and too slow on the Prusa first release).  A Single INBXX has space for 2-1 kg spools using one of the left side brackets.

Using the standard Core One spool pucks, I modified the new telescoping spool holders by adding 5 mm to the inner shaft and trimming a few millimeters from outer handle, so the modified spool holder could seat two 68mm wide spools.

I choose to mount the upper and lower spools on the back left side so I could route the upper PTFE tubes (1-4 INDX filaments) via upper left small port in the back.  Filaments 5-8 exit from the lower spool rack in the lower left small port.  PTFE exits via to top large port would be blocked by the static spools.

Added two desiccant shelves that will hold 140 by 140 by 130 mm alumina desiccant bins above and below the right rear spool holder.  I have not sealed the box yet, may go back and silicone chalk it later depending on how long the desiccant lasts.  

To access the non-active filament spools and desiccant in the back at least two of the active spools need to be removed.   Ends up being a packed cabinet.

Designed to use:

• M3 x 4 x 5 heat inserts (4) and M3 x 16 mm button head bolts (4) to attach brackets to the rear INBXX panel for added support

• M3 x 16 mm button head bolts (12) to attach spool holder pucks to the three brackets

• 5 mm x 10 mm bolts (12) with 5 mm removable t-nuts to attach spool brackets to the 20 by 20 INBXX aluminum frame

• 5 mm x 10 mm bolts (8) with 5 mm removable t-nuts to attach desiccant brackets to the 20 by 20 INBXX aluminum frame

Uses approximately 500 grams of filament.  I printed mine with Galaxy Black PCTG filament and a 0.2 mm balanced print profile.