This model should only be needed if you (like me) have re-routed the bowden tubes and no longer have anything to support the orange wire.
I used an additional bowden tube inside the chain to support it. It is held in one end in the pocket of the " StartTensioner " part. I highly recommend doing this or putting in a few pieces of filament or something, as otherwise, it is very flimsy.
I made mine from standard PLA with supports on everything except for the chain and chain covers.
There is also a small 3mm hole pointing off of one side of the “ChainAttachedToEnd” part. This is designed to be drilled out with an m3 drill bit and if you continue to drill down into the multicolor hub it acts as a bypass for the bowden tube system. I use this for flexible filaments which can't go into the ACE units. It works on both the stock 4-color hub and the 8 way hub I'm using (found here: https://www.printables.com/model/978057-anycubic-kobra-3-8-way-filament-hub-v4)
Good luck and happy printing!
The author remixed this model.
Added attachment points for Kobra 3 printer