I was wondering if an EV could ever use regen as the exclusive method of braking. I guess friction brakes could remain as a back up safety feature. Currently on the roadster, regen is set at a constant... or at least, that's what the posts on this site lead me to believe. I was wondering if it would be possible to have "variable regen." One would set up the brake as a potentiometer that feeds the computer in a way that more pressure on the brake increases the amount of regen. For that matter, application of the brake would also inhibit creep (for when you are at a stop). Does that seem possible to anyone? I realize that I hardly use the friction brakes as it is, but every bit less I use would increase my efficiency.