I was in today to get my cycling brace repaired - rigid carbon fibre with an anterior (rather than posterior) shell and full foot plate designed specifically to fit in my SPD cycling shoes. While it was getting repaired I put the walking brace on and went for spin up the road to get lunch. I'd forgotten how much of a difference the fully rigid brace makes!! But I have 0/5 for all muscles below the knee so need the brace to soak up all the power I can put through from full quads (+ body weight when out of the saddle).
After reading this thread I asked about my walking brace (blue rocker) and whether I'd be better off with a rigid or jointed custom make brace. His opinion was that the blue-rocker probably still gives me the best option. He did suggest I see if I can get hold off a FES machine and see if I could get anything happening on my peroneals - if so them perhaps the 'walkaide' type approach might be OK but I would also have to get an ankle reconstruction if I went down that path to get enough stability (have ripped all the ligaments off at some point in the past). Think I'll just stick to what I have for the time being.