I think it will be fine. The good thing is,if it doesn't, you can brush on a coat of un-treated dope to help out. Even some GENTLE heat with a hair dryer or mono-kote gun will help with light wrinkles. But properly applied tissue, and satisfactorily water or alcohol shrunk, it will sag a bit while the dope is wet, but will firm up when the dope dries. Another approach to it is, pre-shrinking your tissue on a wooden frame before you cover the model. This helps on real flimsy, light weight air frames.
Type at you later,
Dan McEntee