It's true that the car was fast, unfortunately it was also very easy to DNF, as we all who had one, can vouch. I had 2 (the original and the Team) and got some of my best ever results with them, but my DNF rate went down like 200% after switching to Mugen. The suspension broke easily even on electric car (R12 was based on the Mission suspension), let's just say that more weight and more power didn't make it any stronger
Let's not even mention bent lower pivot balls and broken driveshaft blades... and the fact that the shocks were a pain in the a$$ to build with equal rebound and no trapped air.
As much as I have good memories of this car, I wouldn't dare to run one today