I really like the color scheme, but I agree, it needs something back on the tail and horiz. stab. Maybe carry the same combo you did on the wing back there(the three tone thing). I'm not so wild about the bottom, but it's your plane. At least it gives you lots of contrast to be able to see it better.

I like to add a servo screw for hatches, which goes through the hatch and into the servo mounting blocks. Much easier and neater than trying to add tri-stock to reinforce them. Just remember to drill slightly off center so that the servo screws holding the servo miss the screws reinforcing the blocks.