ok, could you at least tell as if it would be an upgrade or something totally new ?...
I can only say that I am working on a research project for Ultimaker. Hopefully drop some jaws when my research is released. I am sure that its something you have never seen on a 3d-at-home machine
EDIT: Daid, you are right. The ultimaker was designed with dual extrusion in mind, but the dripping made it utterly impossible to print good prints. Take also in account that the bowden tube also causes a little bit of extrusion even when the thing is not extruding.