I'd go for the pro without hesitation .
& get the new 2mm shafts .
would probably want to try out the flex control side rails to
It's funny though .
If Durango had first release the car with the 2mm shaft and then put the " R " version out with the old/ smaller shafts ; you'd all still be srcewing about how they put the new optional part out in the "R" ...
Sometimes there is just no pleasing people .