I won't claim the carrrier since the one I made was a rip-off of a RAD carrier. The only difference was that RAD engraves their name and some numbers in the carrier near the seals. Mine did not have that. I'm pretty sure it was RAD that was making ally swingarms too, but they usually were not for stock carriers (same sort of design though). RPM was making aluminum axles before most other people though,,,,,,,,,