Without trying to sound like an engineering wizard, I can't see it ever being a viable project.
Written in big letters all over it is "Experimental"
It was a test bed of ideas that he turned into a reality
Backwards cylinders are only now becoming common place
Mechanically it's impossible to provide the same amount of drive to the front wheel as the rear
I don’t think the intention is to get the same drive to the front as the rear. I believe the 2WD works best with a small amount of drive to the front so the front can help pull in certain conditions.
I think that’s what makes the hydraulic systems better than any mechanical drive system as the hydraulics can be controlled easier to provide different drive to each wheel.
I believe the Ohlin’s system has a sensor on the front and rear wheel’s that determines how much drive to give the front wheel depending on what the back wheel is doing.