Well, the floating ring didn't end up working for my bikes geometry. Too bad. With the dingle cog in there, the outer gearing combo meant that even a tiny 24T ring would rub the inside of the chainstay and at the same time not give enough help to make the chain tension work.
It's now sitting pretty with a half link and the axle is still far enough back to clear full fenders so it's my ultimate dirt road bike for wet days.