I'm hoping for some advise on how to handle this situation.
A few months ago I worked on the first title in a book series of minimum 3 titles that I signed onto with a decently big Publisher. I really love the project, and I am getting royalties from the first copy sold so I am naturally very hopeful that these books will sell well.
After we concluded the project, my editor has come back a few times with some revision requests or additional requests. First it was separating out text from the images that they hadn't known to be a requirement, then I was asked to remove a character from an image entirely because it was noticed that they shouldn't be in the scene, and now I am being asked to revisit the cover because they had additional feedback from external distributors.
I'm curious how revisions like this should be handled. Revision conditions are not covered in the contract at all, and from how these requests have been formulated to me I am not obliged to make them (at least it's been formulated in such a way that I'd be doing them a big favour.) Of course, I want the project to go well and the book to be as good as it can be, so I am happy to do them.
The first two requests have also only taken me about an hour each, so it wasn't that much fuss. The cover I fear might be a bit more complex and require a lot of chopping and repainting, but even there I am usually confident that I can do fast work.
So I was wondering how other illustrators would handle requests like this long after the project has been approved and paid for - would you ask for additional compensation and go through the potential hassle of working out the billing for that, even if it might only take an hour or so to do the job? Or would you just do it for the sake of the project quality and the good working relationship?