Hi guys,
Just to clarify a few things..
DYE have always stated that Rotors are not idealy to be used with Reballs. Apparently some Rotors are fine with them but due to the nature of the Reball (and similer brands) polymers, they could always be prone to jamming in the Rotor.
The newer anti jam arm was included as a tweak to the original design, but there is nothing inherantly 'bad' about the original arm. The biggest thing is that the newer arm is designed to help un-jam paintballs if they do jam up, not to prevent it from jamming.
The vast majority of people have never had a problem with either, and i know that most of our team guys are still running with the originals as there has been no need to switch.
The main advantage with the new fin is that it can help to un-jam sticky or sweaty paint, which is typical with a couple of brands of paint especially in very humid conditions.
If you ever have any issues with you Rotor, or anything DYE please feel free to contact Ash who heads up our technical department on eurotech at dyeprecision dot com or at DYE Europe HQ on 0208 649 6330.
Hope that helps fellas,
Tommy