4 in the front, top and bottom on each side, one in the back, top left. (Top right back would be where the filter would go, if you have it, and the bottom back right will have the buffer. Bottom Left has cabling so clearance isn’t very good there)

Be careful with the spool holders/mounts as they’re not really interchangeable due to the sagging clearance of the spools and the floor

There’s already a few collected guides out there for all the parts you’d need to print to make it work, assuming you don’t want some fancy custom parts as extras or have a custom box you’d wanna leverage

Humidity sensor probably gonna need to move, and need a new mount point printed

Be careful with the tube routing, too long or too tight turns will make the mmu and extruder struggle, had to redo mine twice so if you’re planning to freestyle or experiment I do recommend getting extra tubage

That’s about all I got off the top of my head, if there’s extra stuff I might add it in later

My enclosure has the MMU3 and all 5 spools crammed in there, very space efficient

I’m also gonna cram the filter in there when I get around to it.

This new one can’t seem to support more than a single spool on the side tho

I skimmed the posts, but couldn’t quite locate if the issue persists if you leave the printer alone for a few hours/days and then come back to it later. (As in would it be able to complete a print before exhibiting this issue again) Seeing how it worked fine before and doesn’t anymore, especially if in a consistent matter, irregardless of settings, might be a chance you blew a capacitor and it’s trying its best to cope with that situation. Unfortunately without replacing the board with a confirmed working one it’s hard to tell if that’s the case… plus depending on the level of damage it might appear as intermittent problems that sometimes manifest without rhyme or reason on 2 potentially identical prints.

Looks fantastic. I recommend also printing a cover for the UPS sockets with removable covers for the plugs you wish to use as it looks like you have quite a bit of dust circulating there

Republic of Biscay