Just an FYI...
 

when you toast a cup-side diff bearing (10x16x5) on a savage flux and cant find a replacement anywhere, there are 2 more of those bearings in the wheely bar. I really wish i would have known that when i was down for 2 weeks waiting for those bearings to come in! They are a really odd size and were actually back ordered for quite a while.

Not that hard to find...

http://avidrc.com/product/1/bearings...-bearings.html

Avid bearings are the best non-ceramic bearings available, and at only $1 each, you just can't find a better bearing or a better deal!