Question for the TT02 gurus.

I accidentally ordered a diff case for the TT02RR, not realizing this is the sealed diff and isn't 100% like the standard diff case.

For my purposes, speed running and bashing, would it be worth it to order the metal innards for the RR diff along with the seal, orings and pinned drive cups?

I do round off the diff gear that holds the axle cup in place every once in awhile, but I now know what caused that. Not the gear part but where the drive cup sits in the gear.

TIA