Nice work! I thought about doing this very conversion, but then I
realized I would rather a full recumbent instead of the semi.
I'm 30, so I don't have the worlds worst back and hips, but I have
broke my tailbone on a snowboard and injured my neck in a car accident.
Originally my plan was to get a bent and electrify it in order to get
to work without breaking a sweat. I got laid off so thats just not
going to happen. I'd be happy to pick up a Koosah or an EZ Sport.
Have you considered a trike with power assist? This looks to be the
most comfy position.