I've sort of derailed my own thread here with all this extraneous stuff as I enjoy learning about the topic. I'm still headed for a conventional tadpole. Suspension not needed. Going down curbs doesn't seem like it would be a problem. Going up curbs sounds like a non starter! Trailer doesn't care, kids in trailer might. My route to work would definitely change a little. Even aside from the obvious no trails or curbs, there are a few badly placed wheelchair ramps from sidewalk to bike trail that wouldn't be navigable with one of these. Fortunately all the roads where I'm headed have bike lanes.
The note above about seat height and angle might be important. I'm not sure. I still think sitting down will be the biggest challenge. My legs will be fine, my sternum will be sliced, my abs I don't really know about. The Trail wasn't the raciest trike, they made one at the same time with a 33 deg seat. The current crop have seats that are mounted to the frame instead of mesh stretched across the frame, and the seats are adjustable angle.
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Genesis 49:16-17