Alan,
Go the the first page of the DESC thread:
http://www.rctech.net/forum/electric-off-road/596475-team-durango-desc210r.html
Read the part on adding shims to rear hub. I think this will help with your binding. Same goes for front hubs if you are using hexes. The Kyosho shims mentioned will free up the hubs and allow you to crank on the nuts. Like Cain said though, I would recomend the exotek aluminum hexes. Since you also have a B5, easy to change to 12mm. I use stainless B5 front axels and they work great. I even use B4 rear hexes.
Any questions just ask.