Currently the 4 x Pi5 nodes are running Einstein.
There was a debian point release so I need to go through each of the Pi4's and update them before I can bring them online.
Purchasing the Sandisk High Endurance micro SD cards (yes I use them for the Pi's primary storage) I can no longer get the 32GB versions. It seems Sandisk have moved to 64GB as the smallest size these days with a price increase.