hi all considering changing my B5 4 spoke to a B5 3 spoke got some questions 1. how easy is this to do? 2. what tools are required i remember some else talking about they have hex type screws on the back? 3. are they the same head size as the 4 spoke? 4. what type of tool is required to take the main nut off? 5. will the car have any problems recognising the 3 spoke airbag? SORRY so may questions any tips and advice much appreciated .