Dual brake lever pull on disc and V

I am looking at this idea, but with magura rim brakes, not disc but hydraulics nontheless. Looking at the web to find a 1-2 hydraulic 'splitter' (Goodrige have some but it's not meant to be for bicycle brakes) and of course get a set of (battered + cheap) maguras to play with the idea. Anyone got a set they are willing to let go for the above experiment?

I have been giving the dual brake idea a little thought and have come up with an idea. I am no engineer, so bare with me on this one! Looking at motorbikes, they often have twin front discs with two calipers, working off of one lever. What about copying this setup, running a larger master cylinder on one lever and having two brake hoses - one to the front caliper and one to the rear caliper. It works on a motorbike, so why not on a bicycle? I am not an expert on hydraulics, but surely one master cylinder squeezing fluid down two lines to two identical calipers would give equal braking front and rear?