Jim,
Careful with the leading edges of the wing. I felt I had too much gap in one of them and decided to use a small amount of micro-baloons to fill it. I'm pretty sure I mixed it incorrectly as it never sanded worth a squat and in the end, that's why I ripped it all off and started over. It was much easier after I read about using chalk to mark the edge with. I was trying to think of something like that to use the first time but never even thought of chalk. Alas, it's re-sheeted though.
The Fuselage is 200 times easier to sheet than the wings were. Very straight forward and lickety split. If you get frustrated with the wing like I did, take a break, work on the fuselage, and then go back to it later. Hopefully not a month and a half like me though.
I agree with the frustration over the motor combo to use. As I get closer and closer, I have to start thinking more about that aspect rather than simply building the thing. I was basing a lot of my predictions on similar planes that have been converted from gas to electric. As you said though, too many combinations, too many right answers none of which are perfect. Now that I'm back working on it, I'll have to sit back down and re-calculate the power system.
Post some photos of you're wing covering process. I'd like to have something to be envious about on here.
Dan