This is a modification of the original Prusa MMU2 pulley body that removes the very cumbersome 5 PTFE block locking mechanism.
This design uses 5 E3D V6 compatible pass-through pneumatic connectors to make assembly and jam clearing easier. These should be easy to find.
The alignment of the connectors can be a little tricky, but once lined up they should screw in easily. Don't over tighten, as you are screwing into printed plastic threads! But they do seem to hold very well so far in testing.
Be sure to push the PTFE tubes all the way in. They can be a little tight, but that is OK.
The access holes to push out the hinge bearing pins no longer exist in this design. To compensate for this, I made it so the pins do not go all the way in flush with the outside. The screws are still used to hold the pins in place, they also no longer go all the way in. Just screw them down to the end of the pin. This way if you need to remove the pins, you can do so from the outside with pliers. (Still working on this, not sure if the post is big enough. Be careful not to push the pin in too far!)
NOTE: I have now printed this with 0.4 mm nozzle, and the threads print just fine.
NEW VERSION 0.2: Small changes, larger post for hinge pin. Slightly widened the "after gear" hole, that may help filament feeding. Added holes for small alan wrench to push square nuts out of holes. Make swapping out to newer version easier!
PLA will probably also work fine, but Prusa recommends PETG