Sunlu S4 Integrated Auto Rewind Double Stand

I started with the double stand by Robert Schiele, and after cutting down and testing I decided to build a stronger stand.   Not as elegant as the original as it requires supports and is a slicer special, but is entirely functional.   I removed everything but the spool holder tops and rebuilt a stand underneath from Roberts double stand leaving room for the air to reach the vents and sensors.  Then I added a bottom clip to attach to the middle bearing holder on the Sunlu S4, which clips the entire stand in place very tightly.  I also added a rough draft loading tool for orienting the axle while loading the filament in the S4.

Print the stand twice.  Use the Axle from Robert and the 75mm rewinder from Vincent.

The bottom clip attaches to the stand with 2 m3 screws and 2 m3ns nuts.

I printed with Atomic Filament ABS 30% infill and 5 perimeters with supports.

Feel free to take the idea and build a better looking stand as I have very little experience with 3d modeling!  It works and I am a utilitarian with very little free time!

I attached the STL's without mounting holes if you are using a slicer other than prusaslicer.

I was unable to export with the holes due to the negative volume. 

I am also going to attach Roberts Axle and Vincent's rewinder as people have had trouble locating the correct versions.

Make sure you test the rewinders for direction.  They are directional.  I Definitely suggest some electric tape for a little extra grip.