Jim,
Here is a picture of how I covered the bottom of my plane, nothing fancy but it looks fine for me. If it wasn't on the bottom I would have had a better idea, but not many people will see it except when I hover. And then they will be so impressed with my flying skills that they won't even notice the covering! Ha!

pceagon,
the rudder cables come out on top of the fuse just in front of the vertical fin. I drilled a hole in the balsa block by the fin and took a rat tail file and made it a long tapered slot. The cable cleared the rear bulk head and had to pass over the first balsa stick at the base of the fin and went under the rest of the other sticks, straight to my servo. I hope that makes sense. Pete