1. RC10 rear wheel conversion kit #6802 with #6370 dogbones works nicely (kit hub is #7364).
2. MIP #1198 CVD axles (for B2/B3) with #7364 hubs are perfect.
3. rere-RC10WC rear axle CVA is good but you have to cut off corner from rear arm where the red arrow is.
By the way look how good color that rear arm has. It's dyed with just track dust.

-Niki-