I would love to just buy one motor, I just thought that the KV would have to be alot different for 4s vs 6s. That is definately something to consider. I am not familiar with the delta configuration, I will do some research on it.

Also, what are the benefits of running in series vs. parallel? I do not have my packs yet, so I could do this, but running 2x 4s 4000 packs allows me to use them in an airplane as well as the truggy.