COMPLETED - Spool Holder for a Rubbermaid 21 Cup Container

This is a Dr Frankenstein type remix, where I started with Ocieward's "Ocie's 21-Cup Filament Silos" which looks great, and added a few extras like a latch and my filament guide.  I also re-worked the spoolholder to use use an adjustable type, though it can also use the regular roller type that is original to Ocieward's design.  I'm not sure which I will use yet, but like the idea of using fewer bearings.  I'm hoping that everything fits but will update the design as I go if it does not.  This will likely not be posted for a few weeks since there is a lot to print and test.

Update 1 - 8/28/2021:   This is close to the final design if everything works.  I'm printing some test parts now to see if things fit well or need some adjustments.  The plan is for the back of the container, with the plate attached to the lid, to catch on the "heel" and then rotate "toe" down into the mount where it will be held by the quick release lever.  That will allow the bowden tube to be connected up.  There is also a version to use a pneumatic coupler (which is like everything so far untested).  With the pneumatic coupler, the regular cap (pictured in orange) should be able to be used, which will allow the container to sit flat.  The major changes to the design are that I split the base up to make it easier to print without supports.  This also allowed me to make a bit of a pocket to accommodate some bumps in the lid of the Rubbermaid 21 cup container.  There is also now a desiccant container and some screw positions to hold the spool holder which will still allow some adjustment or swap out for the rollers.  Assuming everything works when printed, I expect this to be posted in the next 2 weeks.

Updste 2 - 8/29/2021: Doh!  After uploading the pics I noticed that I chopped part of the threads off the base, which has been fixed, along with a few other optimizations for printing.  I have shaved several hours off the total print time by adding some holes here and there, and decreasing the thickness of parts in non-critical areas.  The first prototype is not much to look at, but everything works as I'd hoped for the most part and where it has some issues, I'm hopeful the current version will fix some minor annoyances.  I still expect this to be done in about 1 to 2 weeks, and then it will be posted to Thingiverse.

Update 3 - 9/1/2021: I had to make some changes but the design is now tested and works.  It will be posted to thingiverse in the next week and I will add a link to it below.

I uploaded some new pics of the completed design.  Pardon the poor print quality on some of them, it is partly due to a worn 0.6mm nozzle (now swapped) and mostly due to the problem this holder is meant to solve - which was too much tension in the filament path.  Prior to this the filament had to make two 90° turns to get to the extruder, now it only makes one and there is no tension in the filament prior to the extruder.  I have yet to print the TPU gasket but plan to do that tomorrow, and will see if I can mount this to the top frame of my ender3 as well.

Well... maybe one more thing to do, and then this will be done:

Update 4 - 9/10/2021: As usual I can't keep messing with the design.  But since I printed and used it, I noted two things and thought of one more thing that could be improved:

1. The center axis spool holder has too little friction for some materials like TPU which wanted to come unspooled when I used it with this.  So I re-worked it into a roller like the original model has, but this prints with one side and has some caps which hold the bearings on.
2. The desiccant compartment needed a way to be closed more or less securely.  I don't use the loose pellets in mine (I use the pouches), but for anyone who does, it would be frustrating to have them spill.  I fixed that by adding a way to hold the lid down with a screw.
3. Probably not a big deal but the center of mass of the spool is now over the 2020 rail on the "top mount" version which is designed to be mounted above printers that have 2020 rails.  This version will also have a wire conduit to route a wire to the area below the spool holder since that seems like a nice place for a light, however I have no plans to develop that idea further since I cannot use this version on my printers.

I will need to re-print some parts but that'd OK since the originals will not go to waste.  But it will mean that this will not get posted for a bit longer.

Update 5 - 9/16/2021: This project is not abandoned, it's only getting better :D  I have completely re-designed the bogies for the wheels and the way they attach and can be adjusted will be much more convenient (no need to use screws to secure them in place anymore).  It's a bit hard to explain, but I have designed and tested a button and ratcheting mechanism which will be used to adjust the bogies in or out.  I'm still fine tuning some parts of the design but I could post it tomorrow and be 95% fine with it.  The last bit to make it as good as it can be, just takes a bit longer.

Update 6 - 9/17/2021: Assembly instructions posted here.  I should be getting this uploaded this weekend.

Update 7 - 9/19/2021: Thingiverse seems to be having some problem since when I posted the design for the label roll holder (posted above), that thing did not make it into my designs on Thingiverse.  So I can only find that thing when I go to it directly, but I don't find it using search or in my designs.  So the design exists on Thingiverse but nobody can find it unless they go to the design directly, and that sucks.  That's pretty much the way it is with Thingiverse, but I'm gonna wait till they get that problem fixed before I post this spool holder system, since I would guess the only way to "fix" it would be to delete the thing and re-post it.

The design is now uploaded to Printables here:
https://www.printables.com/model/79719