I had one of these 31 in 1 screwdriver sets. It's cheap, but they are actually pretty decent. You can also get them on AliExpress if you're not in the US.
I found myself using that set for my printer way more than the cheap allen wrenches that came with it. So I figured I should build a holder for my printer (Ender 5).
And that's what this is. It clips onto a 40mm extrusion, like a 2040 or a 4040. If there is any request, I can make one for a 2020 extrusion as well.
You can still turn the set around when it's in the holder, but it's not going to fall out of the holder. There are also a ton of other 31 in 1 sets that it might work with, but I only have the measurements for this one.
35% (You want it to be fairly rigid) You can reduce infill if you add walls
It's an easy print. Should take around an hour or less on most printers.