Yea I'm definitely not going to modify the brakes������ this is a hydraulic regen braking system
http://energyeducation.ca/wiki/image.../Hydraulic.jpg
There's claims that it's around 60% efficient in reclaiming braking losses. And below I have a photo of a bladder accumulation tank and a piston type accumulation tank(I'm wanting to do the piston type)
http://www.whcp-oilgas.com/wp-conten...lator-view.gif
There was a claim that with hydraulic regen braking you could get better fuel economy in city driving over highway partly due to being able to kill the engine at stop lights and get to around 40mph before having to restart the engine.