Just got in some Rpm rear a arms for my Outcast. Once I put the rear aluminum suspension mount on it pulls the a arms in and they rub on the gearbox. I thought maybe I had them installed backwards but no they are in fact installed correctly. I tried to install them backwards and they still rub. I also had to ream out the holes for the suspension pins as they were tight going through the arms. Has anyone else had any issues with their a arms?