My Custom Carbon Fiber Revo 3.3 Brushless Conversion!

[Bondonutz]

When switching over from TRX carriers to RPM carriers there is a metal ring on the back of the TRX ones that gets often over looked. It must be removed and installed on the RPM carriers or the balls will pop out constantly (sounds bad?)
You still should check to see if your stockers have that ring, the balls do not pop out and back in again with the ring. If they pop out once they'll surely do it again because the plastic has ben stretched now.