A couple of other tips on the tank. Use duct tape to make a pull tab out of on the back of the tank. It'll make it easier to pull out. Do not glue in the card board wing tube. With the wings attached it will be held in place, but if you need to remove the tank you can just slide it out of the way.

I used termagators how-to to cover my last SE with a flag. It looks difficult at first, but after you get going it's really pretty easy. The only other tips I can give on covering is practice on some scrap wood first if this is your first time. Also, when you start covering just take your time.

Hope this helps

Ken