I fixed the dog bone problem by running hot racing full cv axles. The front axles from a slash 4x4 fit the hub bearing size for front and rear on this setup, but you will need to shim the axles so the stubs don't have slop. Place the shims between the axle and the 10x15x5 bearing until they have no play. You will also need to run the diff stubs from traxxas. There is a setup guide how to do this with the traxxas part numbers. http://www.rcuniverse.com/forum/redcat-racing-support-427/11425428-epx-pro-pede-shaft-upgrade.html I did it a little different. I did not use the set screw style wheel hex. If you do it my way you will have no problems using stock wheel hex setup. You will need a 15/64 drill bit for hardened steel as you need to drill the hole on the crown gear a little larger as well as the hole on the diff cup. Then you need to hone the groove where the o-rings sit slighty so they fit. I haven't lost an axle since. Now I'm battling with stripping diff gear teeth. If I find a solution ill add to this.