Core One L Top Cover - MMU3

This is my remix of the Prusa CORE One MMU3 Community version from Prusa Guy that i plan on using with the MMU3 / MMU2S 5 Spools auto rewinder adapter for (un)original Prusa drybox / Repbox from Sanka  as well as TPdesigns Core One MMU3 community version - rewind spool remix   I don't plan on making a how to/tutorial on putting it together. I just wanted to share with the community so you can make what you want out of it but it can be use with Prusa Guys MMU3 version or Sanka's/TPdesigns MMU3 version 

All holes on the top hat are meant for a M3 self tapping screws. i can modify/add for heat set inserts as well if you request for it.

My plans for the above are temporary. i just needed something to use with my MMU3 for the mean time.

if you have any requests for modifications message me and ill see what i can do. 

UPDATES:  CONSOLIDATED UPDATES TO FOCUS ON CURRENT FEATURES AND UPDATES

-ORIGINAL HOLES FOR THE ORIGINAL COMMUNITY VERSION ARE PRESENT IN THIS MODEL FOR THOSE WHO WISH TO USE THE MOUNTING POINTS FOR THAT BUFFER VERSION

-MMU3 MOUNT FITTED WITHOUT ISSUES I USED M3 14MM WOOD SCREW/SELF TAP SCREWS

-ORIGINAL 20X20 RAILS DIDNT WORK WITH THE NUTS I ORDERED MODEL HAS BEEN UPDATED TO WORK WITH THE NUTS IN THE LINK.

4/14/2026 ADDED THE FOLLOWING:

-MODIFIED PTFE GUIDE FROM SANKA/TPdesigns; HOLE CLEARANCE WAS TOO TIGHT FOR MY M3 SH SCREWS

-MODIFIED REWIND SPOOL HOLDER FROM SANKA/TPdesigns FOR THE SAME REASON AS ABOVE

BOTH FILES WERE ALSO ADDED TO THE FILES

4/17/2026 MOST RECENT UPDATE:

-REMOVED ORIGINAL PC4-10 I ADDED TO THE MODEL AND MOVED IT CLOSER TO THE CENTER/REAR ON PLATFORM C OF THE TOP HAT. ORIGINAL LOCATION WAS GIVING ME ISSUES WITH THE MMU3. I HAVE TO PRINT THE WHOLE NEW UPDATE DUE TO ME GLUEING EVERYTHING TOGETHER FOR THE TOP HAT BUT CAN CONFIRM NEW LOCATION WORKS BECAUSE I DRILLED A HOLE IN THE OLD MODEL AND ITS WORKING WITH NO ISSUES. A 800MM SINGLE PIECE OF PTFE WAS USE FOR THE CONNECTION FROM THE MMU3 TO THE NEXTRUDER.

BELOW IS EVERYTHING THAT WORKS SO FAR THAT HAS BEEN PRINTED

-A, B, C,  AND D SIDE OF THE  TOP HAT PLATFORM; C SIDE HAS BEEN TESTED AND CONFIRM TO NOW WORK WITH A PTFE TUBE SIZE OF 800MM 4/19/2026.

-20X20 PRINTABLE RAILS

-MODIFIED REWIND (BUFFER) HOLDER

- MODIFIED PTFE GUIDE TO MMU3

-VENT AND VENT CONNECTOR

-MMU3 MOUNT

-MMU3 MOUNT LOCK

-D2 LOCK

-D1 LOCK

-A LOCK

UPDATE: ADDED OPTIONAL VENT COVER WITH LEVER (HAS NOT BEEN TESTED)

-UPDATE: 5/2/2026 ADDED OPTIONAL VERSION OF PLATFORM WITH THE OPEN SLOT IN THE REAR OF PLATFORMS C AND D FOR THOSE WHO WISH TO USE THE ORIGINAL COMMUNITY VERSION FOR THE MMU3

FOR FULL ASSEMBLY INCLUDING THE MMU3 I FOLLOWED THE CORE ONE L ASSEMBLY GUIDE JUST FOR THE MMU3 UNIT ASSEMBLY AND THE NEXTRUDER UPGRADED COMPONENTS, FOR THE 20X20 RAILS I BASICALLY FOLLOWED TPdesign and SANKA's guides. as for the platform its pretty similar to the community version with some mods. feel free to ask questions or make requests.

I ALSO ADDED A FEW PHOTOS TO THE "MAKES AND COMMENTS" TAB SHOWING HOW IT WILL LOOK ONCE I REPRINT THE MODEL AND ASSEMBLE THE UNIT

-UPATE: 7/3/2026 updated mounting holes for community version buffer assembly. hole was off my 1mm. below is an image of the updated file showing the holes are now concentric.

hope you all enjoy!