@ Simon, great info... so converting the Roadster is no option anyway. Any recommendations what can be done on the rear drums to avoid overheating?
No sure what is meant by Minifins or Datsun-style drums, as stated by Rovert.


2010 Roadster Sport 3.0 (S3) - black
1997 Mazda MX5 1.6 (NA) - red