Thank you guys for all your kind words and encouragement. I'm going to wrap up this thread and move all my hobbying posts to PaddyMick's Chopshop 'cos it seems easier.
I'll finish here with this:
My club had a competition to invent a space marine chapter. We painted a model and did a page of lore then voted. The part of the Primaris story that's always resonated with me is the Unnumbered Sons, chapterless marines on crusade, so I ended up with kind of a poem to them.
I also thought i'll do a little diorama - my first actually - to try and humanise the super soldier and make him relatable. Unfortunately I didn't read the rules correctly - the model should have been on a 40mm base - and got immediately disqualified 😁
The Sons of Eolia
Vat-grown. No mother, or father, except Him. Indoctrinated, brainwashed, surgically altered; no sense of self, no home, no place in the galaxy – only purpose. Embarking on the crusade of our time, and displaced again, seperated from those you came to know and mixed among others, like you but different. The unnumbered sons. Training, of a sort, of a specialist nature. Urged on by His servants, commanded by His true Son. Finally, war; the great release. Form becomes function, purpose is fulfilled; but still the longing for home, for brotherhood... and then the rift, and the storm, and planetfall. A handful only, and reliant on the kindness of those who have kept the beacons burning. Common threat forces alliance and then friendship and finally assimilation. Sons of Eolia now; and when the storm abates, what then?