The only thing that I can see that I would change is the tank vent line. The way you have it shown in the pics it will siphon fuel from the tank and leak a bit out if you lift the tail high. Just loop the line so that the loop is above the top of the tank. A nice way to exit the fuse is to use a Fourmost bulkhead fitting placed in the bottom of the fuse and attatch the drain line tube to it. I usually put mine right behind the gear.

Other that that I can't see anything that jumps out and screams at me.