I had similar problems - I solved mine by using the date limit on edits (for everyone) - while a bit of a pain, my community got used to it.
In my case - 10 minutes edit with no indicator, 2 hours with indicator.
When I first implemented the 2 hour absolute limit, many complained, but within a short time (a week or so) the complaints went away as all saw the value of it. Not sure why people would need more than 2 hours anyway..
FWIW..
Cheers,
Bob
