I've been working on the BSA sidecover project again. I ran across this treatment this morning at Pipeburn. Obviously not a BSA but the frames are essentially the same from this period. It certainly wouldn't compliment the aesthetic we're shooting for but an interesting method nonetheless. Hose management is interesting as well.
I'm a little further along than this photo shows but my progress is slow. I actually made a paper mockup the other day that looks promising. Given the time I may make another based on a different idea. After that, I'm not sure. I may make one from foam with which the Chief can work or I might bang one out of some aluminum flashing I have just to see how it will look.