[ovirt-users] How do you install oVirt Hyperconverged with six or nine nodes instead of the default three nodes?

Already have working three node 4.2.5 HA cluster in the lab using this guide: https://ovirt.org/blog/2017/04/up-and-running-with-ovirt-4.1-and-gluster-sto.... Now I would like to test a six or nine node cluster mentioned in the RHHI 1.1 guide. Is there some doc I am missing? Thanks