Don't buy Grimeca's from Motobins, Both mine have warped in considerably less that 40,000 miles - i.e. less than half that mileage.
It was actually in my grand scheme to use an ebc disc as a replacement as I understand it was also lighter than the cast iron alternatives offered by Motorworks and Motobins. Ho hum!
Looks like I will have to give it some more thought
cheers for the 'heads up'
SteveH