Genius.
In the same spirit as calendialing, you could have a weekly goal to check in on your buffer levels. If you create that meta goal carefully, it’ll occur every Sunday.
Carefully is some combination of the right amount of starting safe days and/or a lot of starting safe days and incremental use of the ‘ratchet’ feature to trim the safety buffer until it’s due on a Sunday. And six days worth of respite after a derail.