- Messages
- 205
- Reaction score
- 249
- Location
- Woking, UK
- Arrma RC's
- BigRock 4x4
- Kraton EXB
- Notorious
- Senton 3s
That sounds like it was a bad moulding with an air bubble, making that hollow would actually be quite difficult to do consistently and the material saving would be tiny.hollow in the circle around the ball