I'm doing some reading on the Model 3 breaking system and having some trouble finding some clear information. 1) Does the model 3 use the iBoost break booster? If no what system and how does it work? 2) The parking break appears to be a separate electric only break caliper/system? 3) Is the parking brake caliper ratcheting or screw type system? Does it need constant power to stay on? 4) what happens if power fails is there a pearly mechanical braking system? I would assume without break boost but hydraulic. 5) With regenerative breaking, does it work on a full battery? Where does the generated power go if battery is full? Does this affect one peddle driving?