Definitely don't use CVDs, they will bend on hard jumps and cartwheels. I went through a few pairs on my brushless Revo before realizing you need the give... Dogbones is the way to stay.
I found out that I cracked the stock wheel hub side cup (hope I said that correctly) on my front wheel this weekend. The steering was all bound up - couldn't figure it out until I just about has the whole front end tore apart.
That's a heck of a thick piece of steel to crack, but someway, somehow, I did it!
Losi 8T 1.0, Savage Flux - XL style, LST XXL, Muggy, 3.3 E-Revo Conversion and sitting outside 425hp, 831 Tq Dodge Ram Turbo Diesel. It SMOKES