EvZ, I think you will find this thread very helpful: http://forums.hybridz.org/index.php/topic/69706-reaction-disk-pictures-and-walkthrough/ My own experience: Valuable hours and sweat have been put into puttering with my brakes in the past. If you undo the MC nuts on the booster, pull the end of MC out of the booster (no need to remove hard lines), let it sit on the side, use a hooking device to pull out the locking plate that keeps the push rod in the booster, and pull the whole push rod out. This may be the solution to all your problems. There should be a 5mm tall black rubber cylinder attached to the back of the push rod. If this "reaction disk" is missing, then you will never really get your braking right. If the reaction disk is missing, you either have to pull off the entire booster and shake the hell out of it until the "reaction disk" drops out or fabricate a 5mm tall rubber cylinder. I found fabricating easier, as your arms will be very sore after shaking the booster back and forth (it's harder than it sounds). After all this is done, leave your push rod... I would say with about 5-8mm out (from behind the nut to the end of the threading). Drive the car around and see if it is better, and adjust the push rod accordingly.