I keep seeing setups where people have to have multiple Hot Ends for printing multiple colors. What would be nice is to only need a single hot end to print multiple colors and while the inkjet system isn't quite an option (yet) for filament based 3D printing I've come up with a few ideas for a single hot end that one can feed filament through. figured I'd see what you all think. I've seen the Kraken and while the water cooling is a neat thing it isn't always an easy thing to accomplish. My ideas may be able to offset using multiple fans using a shroud like the one the E3D -v5 and E3D-v6. It wouldn't necessarily solve the problem of still needing a stepper motor per filament type but the extruder assembly wouldn't need to be increased any for the majority of printers (especially if using a bowden setup). It also keeps the nozzles a little closer together. Any thoughts?