Incremental normally, but every 4th be a full back up

Hi,
I'd really like to be able to set the program to make incremental back-ups nightly, but once a week make a full back-up.

It sounds like you could do it in two separate tasks, an incremental one nightly, and a full one weekly - But the weekly one will coincide with the incremental one, making managing the back-ups messy.

Could it be arranged in the scheduler for the Professional version, to be able to pick every 2nd, 4th, once a week, 14th or once a month back-up, to be a full one? Perhaps schedule back ups as incremental, with a tick box to make it a full back up at a regular interval?