I really didn't stop to think too much about 4s when I ordered it last night since it recommended 3s and I picked up a three set of 3s batteries...oh well, I can use those for other builds not a waste. I'd much rather have it on 4s, especially since I hand launch. I'd also like some excess power, helps the learning curve of an EDF. I've got a couple 4s batteries coming, a 1300 and an 1800. I'll see how it handles with these, probably maiden with the smaller one.
I think I'll also tone down the aileron rates and add a bit of negative expo, and do the opposite for elevators. I have some experience flying planes with pretty rapid roll rates, so that doesn't bother me too much, but I'd like it to be smooth and not too twitchy when I just want to do standard turns and stuff.