I never have been a fan of copying standard reports, and doing some upgrade projects only increased my distaste on the matter. Image may be NSFW.
Clik here to view.
This report has like what, 50+ includes? Have you copied each and everyone of them to a custom version?
Anyway, on the subject, have you tried to approach the problem from the opposite angle? As in only copying what you really need? And building your custom program like that? It would allow you to understand what you're making..
