Sounds like a good set-up you have going on the b4 (it is only a .1 if it stays rtr lol).
Also I would recomend getting the alum. front hinge pin brace, then later on the factory team Ti turnbuckles. Other upgrades are the blue alum servo saver bolt (people claim it has more tooth to bite into the plastic) and the HD servo saver spring (those would be better if you plan on racing, other wise it isn't really a big deal)