Another dumb question for those that know these things... As previously posted i'm fitting Tiguan wheels to my T3. My delivery of "mag wheel nuts" from Just Kampers yesterday and the .. ? ball part of the nut... the seat? doesn't seem to be the same size and shape as the Factory Tiguan Stud nuts that came with the wheels. Although the thread size is correct the the "ball" of the nut seems to be a bit bigger and different profile so it doesn't imbed itself all the way into the wheel. Any suggestions?