Replacing large drives with smaller ones

I have a 5-disk 5D3 with a mix of 4 and 6 TB drives. I’d like to remove, one at a time, the 6TB drives and replace them with smaller capacity drives.

Am I correct in believing that as long as I stay well within the data size capacities indicated by Drobo’s capacity calculator, that this should just work?

Thanks.

Shouldn’t be an issue if you wait for the rebuilds after each swap, don’t expect them to be fast, & expect later ones to be slower than early ones.

Great. Thanks for the confirmation.