[ceph-users] Move WAL/DB to SSD for existing OSD?

Nautilus - Bluestore OSD's created with everything on disk. Now I have some spare SSD's - can I move the location of the existing WAL and/or DB to SSD partitions without recreating the OSD? I suspect  not - saw emails from 2018, in the negative :( Failing that - is it difficult to add lvmcache to a osd? -- Lindsay