I used the "official" dual extruder carriage I received from Flsun and the files found here: https://www.thingiverse.com/thing:2425306 to design the printable version of this.
It should work with the Chimera and Cyclops dual hotends and clones of them.
Please do let me know if you print this!
Dual_Carriage_2.stl | 96.8KB |