I wish I had a girlfriend like That" But then My wife-nevermind"

the batts need to go, with as little dissecting as possible. and You may find that the tank will then slide out, or at least You should be able to see it more clearly. I have cut the lower or upper balsa to allow the tank to come out that way, and then built a removable hatch and reinforced the opening. If the glue is epoxy then You can sometimes use a 'Hot Knife' to remove it,

Hope it Helps" and just watch the post's there should be more suggestions.

Welcome Back
Dan Z