For us low timers, we don't want to get caught with too little sick time if something goes wrong. SLMU allows us to call in sick and then replace the time if we choose too. I think the magic number that will carry you through until disability kicks in is 200 hours. Once I get that there won't be any more need to use sick leave make up.

For now I can call in sick on a 11 hr three day (yes we have them but only junior people fly them so no one cares) and make it up with a 2 day of my choosing in the next 3 months.