Nice to see a few more comments here. I am currently on hold with the bicycles, as my SS only covers one hobby at a time, so I kind of rotate; but I have not given up hope.
A comment for those who do not know, you can not easily fit an English style full chaincase on most hockey stick chainguard English bikes because the full chaincase has to go inside the seat stay. The bikes that came fitted with them had removable seat stays for that reason. In the end, probably the best thing to do is find a 50's Roadster that already has a full chaincase and restore it; as you can see from my sig line that is really what I want anyway.
As for noise, I seem to remember that they hum and boom and rattle a bit
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