I have to admit,i'm a bit partial to the odd rotor or two(i've owned several)I also have to say i believe Mazda was the only company willing to rock the establishment,as the big three and others knew the potential of these things (hence why they collectevly took up so many patents)to potentially bring the old guard to it's knees.....they are just so bloody simple!Yes they had early issues,but what newish invention does'nt.
I once pulled a 13B down,replaced everything with new bits,and back together in under 4 hours without formal training just a very good workshop manual.Now imagine the ramifications of that in the motor industry.

Thats going to be one hell beast when finished