Just received a few more photos from the manufacturer. Look at that join!
There is a slight issue with the holes for the plate though. It seems my model from Fusion has come across a bit weirdly in Solidworks. I suspect it maybe the way I’ve done the threads. It isnt a huge issue though, I just need to provide some accurate measurements of where to place them.
Speaking of the plates, I ordered the ANSI and ISO variants today – one in raw alu and one brushed stainless steel. Main thing is to confirm layout compatibility but also to compare the materials. If I’m happy with how the alu comes, I’ll likely arrange for the GB order to go direct to the anodiser to be done with the cases.