Thanks all.
Lots to think about there.
One thing being, straight or delta?
Straight has advantages in performance, but delta is probably more robust.
The Flying Wings people have some interesting designs, like the Slipstream.
But they have quoted £45 (sterling) for shipping, which I think is just ridiculous.
Thanks for the offer Aidan.
I think, as I need something that will perform in light conditions too, I might go for the Mamba.
The Venom also looks good, but at 50" you can't chuck it in the car quite so easily......
Actually, having just put the back seats down again (where they usually are) and had a quick measure, maybe the Venom might be a good choice.
Decisions, decisions...
Ron