Finally got around to adding my LSI 9211-8i (H310) to the system, as I've been at capacity with onboard sata ports since last year.
Luckily no issues with the HBA, I know some had issues when X399 was first released, I assumed later bios releases fixed that issue.
Once the HBA was in, I added a couple more 10TB drives for good measure, which are currently preclearing, once done it will take the array (alone) up to 70TB.
I hope to push past 100TB in the next few months, although if multi-array is not released soon, I might build a separate storage only machine with my spare unraid license.