BMW-M-Mexico, I perfectly understand you want to stick with RDSport parts, but you could easily save a lotta more weight by using
- dymag wheels
- ericsson + seibon + vorsteiner = FULL CARBON FIBER BODY PANELS ( front + rear bumpers, side skirts, doors, roof, bootlid, hood & front fenders.) Only the rear quarter panels are still in metal since they are a part of the bodyshell.
- Movi't Ceramic brake discs.
- other seats than the BMWP ones.
Just my ideas. What do you think ??