Minimalistic alignment & support base for Integrated Spool Holder + Buffer for Core ONE & MMU3

This is my very first model. It is extremely simple, but it does the job. Maybe you’ll find it useful, too. I’m open to feedback.

What is it?

I really love the wonderful Integrated Spool Holder + Buffer for Core ONE & MMU3 from @DiscoJon. In my opinion, it looks much better than the original MMU3 setup with the large, bulky buffer attached magnetically to the Core One chassis. Also, I want to have all filament spools on a shelf/board above the printer, which is somewhat difficult with the original setup.

This model is placed below those great spool holders/buffers and was designed to fit under the original "Core ONE (220mm Y-Axis) MKI" model (with the “old” spool holders). There’s a side part you need twice, and a middle part. It should also fit under the MK II, but you might have small gaps between the three parts.

Why?

Two three four things:

1. I use spools that are wider than the standard ones -- looking at you, Amazon Basic PETG filament...

2. The space on my wall-mounted shelf is very limited, and a few millimeters too small. I don't want to risk that the spool holders fall down.

3. I like having all holders aligned perfectly in one line.

4. I already printed the MKI version before the MKII version came out.

How to print

• PETG (black) was used; PLA should also work

• 0.4 nozzle with 0.2mm layer height (balanced settings)

• 15% honeycomb infill

• 4 perimeters

• No supports

• Print the side part twice, and the middle part once

How to use

Using it is quite easy: put the side parts on the left and right under the “first” one and a half spool holders, and the middle part between them.

There are no special joints or anything like that - just place them together. This allows you to adjust the spacing between the spools as needed.

FreeCAD source files are attached.