Twisting the leads at least 1~2 turns per inch. Since I build my own packs and switch harness, I start with two single conductor wires and chuck one end of the pair into a power drill, and hand hold the other end. I then let the power drill "wind" up the wires into a "twisted pair". This is very similar to the CAT-5 UTP (Unshielded Twisted Pair) cable that is carrying the internet to the very computer you are using right now. It is a very common way to reduce RF noise.

Back to the Eagle. Going over the covering to take out minor wrinkles and seal down the edges is perfectly acceptable. Most of the common late model ARFs I've come across are done pretty well, but a few spot where the edges are not sealed down perfectly is not unreasonable given the mass production nature. Takes me less than 20mins to go over the entire ARF covering. Besides, $399 is not a lot of money for an ARF as large as the Christen Eagle. Just a few years ago, companies were selling comparable box-a-balsa kits for more than that.