Well, after failing miserably with my pigeon idea to the extent that I'd have to submit a 100% crop (no thanks), I had another idea. I don't know why, but I seem to keep on erring towards the abstract in my photography, and if there's nothing weird about it, I'm not happy.
Anyway, hopefully it's not a step backwards. I think I'll experiment more sometime next week when I can find the time. It was great fun flailing about in the garage trying to get this, and I think I know what I did to get this particular result, so hopefully I can work on it!