Made lots of new assembly renders... Now it's simpler If anyone want to try and build the printer on it's own.

You can find the new assembly render files on github (plus some additional files like datasheets). 

Finally i had ended months of testing all of my stepper motors in real life and chosen the best for this system (i think :P):

- for all axis: Wantai 42BYGHM809  - 400 step/rev, 20tooth gt2 pully, TMC2208 driver with spread cycle on, max current set at 1.2A, 1/8 microstepping with 1/256i, with these steppers and setup this coreXY setup can run at 395mm/s and 3500 acceleration without missing steps... plz don't print at that speed... damn it's ugly.

- for extruder: Jugetek 17HS1070-C5X - it's not heavy, just 34mm long, and without the 5.18:1 ratio planetary gearbox you got an nice small stepper that has an shaft with 11 tooth that's perfect for my geared 3:1 direct extruder.