Interesting info.
E80 and E100 drums, wheel bearings and brakes shoes are of same size.
But front rotors are big. Don't know that front discs pads are different or not will share it when install them.
So this means that proportional valve ratio of e100 and e80 is different. Now I need e100 valve otherwise rear may lock earlier. Reason, because drums are taking same force but now front discs will take more force. For example if you press Pedal. 5 newtons force goes in front and 2 newtons force in rear. That 2 newtons is enough to lock rear but 5 is not enough. Result will be locking rear first.