Jack, thanks so much. It turns out I already have a pair of these:
http://www.hobbypartz.com/77p-91-ere...-onepiece.html

and I got the struts from VQ, so I should be good there.

I have a Scorpion 4020-10 for 5S...now I just need to figure on a prop, but that can be decided later.

I'll probably use an Arm Safe type plug and run an exterior balance extension so I can charge with the pack in the plane.

thanks again for your help!