I'm thinking of buying the www.turnermotorsport.com KW version 1 coilover kit for my 2006 Z4 si roadster. Any forum members have experience with this kit? Any big deal to install it? Looks pretty straight forward. I don't want the version 2 or 3 since I don't race. Just want to lower the stance a little to get rid of the wheel gap. Any opinions? Thanks .....