Quote Originally Posted by wirlybird View Post
Anyone read up on this yet? Looks interesting.

http://shop.prusa3d.com/en/3d-printe...l-upgrade.html

Very interesting. I am not clear on how the color change works. The "multiplexer" obviously handles the electrical split across the 4 extruder stepper motors. The video seems to suggest a massive filament retraction between colors, but I have to wonder what the previously "melted" end of the filament is like and how jams of that retracted and misshapen end would be prevented? Particularly when the distorted filament end must again be (re-) used.

Also, does the height of the "waste tower" pace the height of the printed object? Is that parity maintained for filaments that are unused up to that point in the print?