Building an MKIV Roadster and have converted the 8.8 rear axle from 4 to 5 lug. Using the FF Cobra rear brake upgrade kit - 11.65 rotors along with the 10.5 Halibrand wheels. Two questions - (1) what are the sizes for the wheel studs, same as the front or will the wheel offset impact the length of the studs? (2) having difficulty getting the rotors to fit inside the rear caliper and pads supplied with the kit - not sure if there is something I should be doing to the caliper since it came assembled. Thanks for any advice you can provide.