Hi Damo,
Please email our master tech
achaplen@dyeprecision.com if you are having any issues with your Rotor.
Here is an extract of a post i made on paintballer.ie recently on the same issue. Hope it helps to explain things further.
"This new arm is coming fitted in new Rotors as it has proved a more proficient way of unblocking a jam that is caused by sweaty/sticky paint, but that does not mean anything against the standard design - It works great by most accounts. I am still using the stock arm as my Rotor has been spot on and there is no need to change it and i know that is the same for all of our teams here.
I can't speak for the US but after speaking with the guys here there is no need to do straight replacements on all of them as the rotor arms as 99.9% of Rotors will only jam in extreme circumstances and if they do most of those jams will be cleared as is.
If you are having issues with your Rotor or would like to discuss switching the arm then please feel free to contact us. The best person to speak to would be Ash Chaplen who heads up our technical department on achaplen@dyeprecision.com "
If you ever have any problems with any of our products, please feel free to contact us direct via phone or email and we will do whatever we can to put it right.
Best regards,
Tommy