This is an easy print with most settings Default should make it easy enough with no supports,But as my 3d printer is highly specialised and modified I cannot recommend print settings.

I wanted a way to store fruit and veggie seeds so I designed this little compartment for the seeds, I am also designing a magnetic closing lid for a storage container, the exact dimensions of the box are 11.7 W x 29.7 L x 19.5 H (all in MM) and the organiser slot is exactly 12 W x 30 L x 20 H to allow for tolerances and the chamfer on the outside is 3mm @ 45 degrees on the organiser and box

DISCLAIMER:
I have not yet put the organiser up yet as I have not Finished printing it to check tolerances in multiple prints