Have you been on the home brew again ?Here’s a wide out question - could this be cast in aloominum? Not your common or garden stuff, but something that with some heat treatment could become quite stiff?
I’ve done quite a bit with Rover’s K series, and the spec they used for these, after some heat treatment makes it stiff as hell. I took a sledgehammer to one once, it just bounced off. It’s likely, but I don’t know, that it would make a stiff but springy wheel?
Anyhow, just a question.