Just a follow-up...
I finally got my ARF together, and have flaperons setup on my Avistar (see the pictures below). It was pretty easy to make up a dual servo tray for the wing. I flew it for the first time today, with the help of two very experienced club members! I was able to take off a few times on the second tank, and I landed by myself on the third tank! Nice calm day... very nice for a newb to fly!
I haven't messed with the flaps while flying yet, so can't say how they work... will post another update after I've soloed and had a chance to try them out (I'll let you know if it was worth the extra effort
).