Estimate Reminder (expired or nearing expiration)

It would be so useful if it was possible to send an estimate reminder in QF. For example a reminder that their estimate is due to expire/ or has expired.

There is an option under “routine email” to send 1st, 2nd and final invoice reminder. Something like this for estimates would be very useful. At the moment I am manually editing the subject and message content before resending again. Would you consider adding this feature to estimates?