One at a time. I also can focus the energy on either the more front of the nose or the back of the nose towards the throat. I wish I could explain how but I cannot and it would be good if my kids could do it because it can help a lot.

Using the SAS cards instead of the FC controllers should be fine, but it will be a different beast. The MD3600 controllers are basically your RAID card and you use a SAS HBA to connect to it. The virtual disks are configured on the MD3600 and exposed as LUNs to the hosts over FC. If you put plain SAS controllers in the storage chassis instead, you are exposing all the bare drives to the host. That is how I would do it if I were in your shoes and then would just create ZFS arrays over those bare disks. If I were going to try and have multiple hosts using that storage then you would need to stick with the MD3600F.

You probably need to reset the configuration on the controllers. I’m not familiar with that particular unit but older ones had serial ports that you could plug in a cable to and would either have a firmware prompt for commands or a menu system that you could interact with to do things like clear errors or reset the configuration.