You can happily run the car straight out of the box, so to speak, and the car is
very competative. In fact some people prefer the car without the axles and e speed hangers. Just because most of the "top drivers" use these parts doesn't mean that you
have to have them
.
Whilst the slightly different suspension geometry does increase the driveshaft plunge slightly it is the e speed hangers are the parts that give the extreme driveshaft plunge, which is partly what they were designed to do.
The axles allow you to use the inner hole on the wishbone without limiting the shocks length,
if you wish to do so. If you use the middle hole on the wishbone (as I do almost all the time) then you only need to add 2 or 3 internal limiters (again which I do all the time) and you can then use the B4 axles with no problems.
Hope that helps a little