Since the cluster is for testing purpose you can directly reinstall ESXi using .iso custom image for Hyperflex
after all nodes installed with ESXi you can continue with adding nodes to Intersight
and for the rest you can continue with Hyperflex Edge deployment guide
Regards
Budi
Getting Started
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: