Firstly, I have managed to install an Xpenology DSM7.2.1 and it seems to be running just fine, so a big thank you to whoever provided the means to do it.
I have a couple of Synology NAS units, one being a DS920+. I've been looking at expansion units which has got me wondering if there is lurking somewhere an Xpenology setup to build an expansion unit for a 'genuine' Synology NAS. It strikes me it would come in handy maybe?