[ovirt-users] Upgrade via reinstall?

Hello, I currently have an Ovirt 4.1.8 installation with a hosted engine using Gluster for storage, with the DBs hosted on a dedicated PG cluster. For reasons[1], it seems possibly simpler for me to upgrade our installation by reinstalling rather than upgrading. In this case, I can happily bring down the running VMs/otherwise do things that one normally can't. Is there any technical reason I can't/shouldn't rebuild from bare-metal, including creating a fresh hosted engine, without losing anything? I suppose a different way of asking this is, is there anything on the engine/host filesystems that I should preserve/restore for this to work? Thanks, -j [1] If this isn't an option, I'll go in to them in order to figure out a plan B; just avoiding a lot of backstory that isn't needed for the question.