Hello everybody:
I´m a bit dissapointed of still reading complains about R4 diffs, because the eal thing is that that´s a past matter. Since i´ve been running the hard cases, i´ve spente more than 10 L of blend whith the same rear diff, and i´ve had no issues. I agree that Kyosho made a big mistake whith the first design, but soon or late, they´ve solved the problem.
Fot those who wonder if the car is faster than the RRR, i can tell them that at least in Spain (we are 3 Kyosho sponsored drivers), we´ve beaten all our past track records in every track we´ve raced at, and at least me, in my hometrack, i´m 1,5 tenths faster per lap whith the R4. May be R4 is not as relyable as RRR, but concerning the speed, believe me,...is faster.