I would start with the RAM upgrade. Then use a new USB stick for the new loader and use the last known working settings from your 3615 loader (Sataportmap etc) and create a new loader.
Also can you PM me the output of the command dmidecode ?
Is this the image I’ve translated and created the automatic model.conf generation ? It still needs some work but I’ll release an alpha release soon.
Afaik it looks that QuTS hero requires licence. It needs a lot of reverse engineering and I’m not that skilled.
I’ll be calling soon for few physical system testers.