Ahoeben...Thanks for your reply I think this is a wise suggestion
Kmanstudios ... The am I allowed to say which printer it is? but anyway It does take 1.75 filament but the hot end is a 2 x 1.75 filament in, but only 1 nozzle out See Pictures
Apparently, Repetier host allows for this type of printing. I have managed to get the printer to print some successful items (I think) in single colour (calibration Cube), but because you need both filament inserted, I was just trying to get the program to mix 2 different colours so I can learn how this is to happen...Hope I am making sense.