I’d like to suggest SD has the option to add a free text alert (like the ones for timers) but assign them to waypoints (WP). The idea is that one could place a WP at an RPS boundary and as that WP is passed an alert would pop up with “Call for new RPS”. Alternatively, one could set up a WP 10 nm from a destination airfield which could say “Call for airfield info”.  I have timers set up for FREDA/tank changes at 30 min intervals but these never coincide with my destination arrival so it could also be useful to set a WP alert at a destination ATZ boundary (or TOD) such that you get a reminder to do a pre-arrival FREDA.