Would this be acceptable as a fix? (shown previously)
Only you can decide. If what you are trying to build is "for entertainment purposes" then I can't imagine a little tweak being a problem. If money or pride is involved, you may end up involved in some heated arguments (or fights).
Basically, if the Uno is out a little would it not be ok to give it a little back each loop?
Certainly. But you should first confirm that your Arduino really does have a resonator instead of a crystal.