hey thanks for that Colin, sorry I didn't get back sooner. Still looking for an e90 330i, PPI today saw me walk away from that example. I'll keep any eye out.
I knew RFTs on an X5 were pricey, I didn't expect 225/40/18 and 255/35/18 to be as scary as they turned out! $2k for RE050a, or $3k for Pirellis. It wasn't just the rubber.
Hey ho, I'll keep looking, better informed.