Your tank installation looks good. Are you keeping the original rubber band hatch retainer. Seems the simplest, lightest, cheapest solution.
I wish I had a tube bender as I could do with getting these slightly better placed. No doubt some inspired idea will happen

I covered all the control surfaces first except the top surface of the ailerons as they will have about an inch wide strip to attach them, top and underneath and the top wing covering will go right over that and the ailerons - thats the theory. A few akward jobs like the control rod exits on the fuz will have a small amount around them added before the main covering is added as it makes that job alot easier. Have you added any side thrust? I hope to have about 2 or 3 degrees as advised in his article. Beware theniple on the enya silencers. They get loose. Make sure you add some locktight to it.