as it sits how does it balance? if it balances well then cutting lightning holes in the aft fuse will throw the balance off, and require added lead in the nose. If it is tail heavy and you have lead in the nose, then removing some bulk from the aft end will help because you can then get rid of nose weight.
granted, it will still likely be heavy, but it will always be good for practicing stuff like inverted flight, or squares, especially making that first turn down on the outside sqaures,, that way if you miscue, no HUGE loss.
a flyable plane is a flyable plane.
myself now that I dont crash quite as often, I find that I keep my tanks (pigs other wise) in the hanger for backups. or when the wind is howling.