Hi ineedmoresleep,
Thanks for the initial update.
There will be a break in and adjustment period for any new mattress or sleeping system as the foam layers lose any of their “false firmness” and the cover stretches and loosens a little and your body gets used to a sleeping surface that is different from what it is used to (see post #3 here). This would typically be a few weeks but it can be shorter or longer depending on the specifics of the person and the mattress.
It can be quite surprising to some people how much their sleeping experience can change over the first few weeks of sleeping on a new mattress and if possible I would tend to give any new mattress at least a couple of weeks before doing any “fine tuning” by rearranging or exchanging layers.
Phoenix