Here two (hopefully) helpful files for your MMU3 buffer.
I need to re-arrange the buffer, as it comes on my (self-built) enclosure. Therefore, I re-designed the buffer-plate for overall design works (TinkerCad). Also the long buffer-holder-R3/R4 has “as is” no value to me, so I cut off the long side. Now I can attach whatever fits best to me (Cad-wise).
The sideplate I took measures by caliper scale and re-drew as good as possible. Think it is very accurate. Needed this for arranging my buffer and spooler-fleet on the top side of my enclosure. In case of a missing or damages buffer-plate you can quickly reproduce the plat by printing it. Mind the thickness is 1.5mm, thus check for the correct LH-combination!
My final solution of unspoolers and buffer arrangement ist still undergoing. I will keep you tuned. If you apply for a follower of mine, you'll get notifications about new progress.
Explore my other Printables: https://www.printables.com/de/@Tritschi
The author remixed this model.
Cut off the unneccesary part of buffer-holder-R3/R4 for different attachment to my enclosure.
Took measures of buffer plate and re-drew, as I did not find a CAD-file containing the buffer plate.