Finally it's done.

To duplicate the ports of z and y motor used DuoWeiSi expansion boards made simple Y cables to get enable, diretion, step and 5 volts from rumba, and seperate power suply for these motors.
https://pt.aliexpress.com/item/DuoWe...311.0.0.fTJhdZ
e4477ac4-6319-489b-9326-8cc6da4b8f21.jpgNow waiting for Mk10 extruder parts to upgrade for dual extrusion.

1.jpg2.jpg3.jpg

Here are link if you want to download Sketchup files:

https://3dwarehouse.sketchup.com/mod...r-400400-Vslot
Printer design

https://3dwarehouse.sketchup.com/mod...inter-extruder
Printer heads design