Just to put the record straight, the very early discs when Hi-spec first started were made from BMW blanks.

The current discs are sourced from the EXACT same British foundry as the AP ones.

Regarding the bolts shearing, it was discovered that a rogue batch of non-hi-tensile bolts got mixed in with the normal lot and also that people weren't following the torque settings and did them up too tight.

DannyH also suffered from the Greenstuff syndrome .