I was in MMC yesterday raking the car for a job. I asked about the rear "clunk". They use a heavy duty grease". ". I put graphile on when replacing the wheels. The tip they gave was put sone on the inner end of the wheel hub so it gets pushed inwards as the wheel slides on. I do that anyway, plus a small amount on the leading edge of the splines on the hub. I'll delve more on Friday when picking the car up. I'll ask which brand grease they use. I might be cheeky and take a small tub to get a "sample"! There quite a few Supersports going through production. Looks like sales are decent.