[sims] PM registers taken in different slots in the day?

[PRAWG]

Hi all, is it possible to assign the PM register into different timetable slots for different year groups? We're all on one timetable technically, but in practice, for example the 11th slot is at 1200 for Y2 but 1400 for Y6, so what would work best is if some year groups could have PM register at the 11th slot (for example) and others in the 13th.