Love the rear diffuser ~ it was standard on the E70 model in M trim and definitely needed. Surprised the front chin spoiler requires the roof spoiler - not seeing the ying/yang relationship personally. Did I notice you added pin striping on the leading edge of the chin spoiler? Suddenly it "popped" in the last set of pictures.

Did you do the M sports exhaust too? Yours looks similar to ours, but going with black wheels. Wife and I are armwrestling over the M performance, exhaust, and rear defuser (we have crazy high curbs around here and chin spoilers tend to get munched.)