335d coupe, bit off topic... but curious to know why you sold the Z4M Roadster? Would it not only be about 7-8 months old? A dealer up here in Scotland was selling a couple of used Z4M examples (just over 6 months old, only a couple of thousand miles) and they were up for sale at around £7000 to £8000 off new list price
But yeah I remember reading all the info on z4um about breaking in the Z4M and whether to take it gently or just thrash it!