Again, thank-you for taking the time to help B Design. I like the closed loose loft surface - that one looks really nice but may be a bit too rounded. I’ll try adjusting the weight in the corners as you suggest.
The other one is close - that might work. I think one of my first attempts was similar, using rail revolve but it created a bad object for some reason. I abandoned that method in the end but yours looks very good. Thanks.
The video times out, not sure if my Firewall is up to something. I’ll see if my phone will download it.