Sorry if there is another forum for retro-directs, but my search attempts didn't find it. Please aim me there if it exists.
Anyway, since a RD uses two single-speed freewheels stacked on the hub, this seemed like the place to start. I'm planning a setup like this
but WITHOUT the front derailleur.
I've got most of the parts, but still need a chain. I'd like to have a chain with several different red, white and blue colored segments, so the progress of the pieces through the driveline will emphasize the weird set-up (and encourage me to keep my chain clean for the first time in my life!) So far, the only 3/32nd chain I've found that comes in these colors is the KMC Z610. There's no shifting of the chain in a RD, but the chainlines will be far from straight. Will a single-speed chain have more problems with this than a 7 speed chain?