I was mistaken the derailleur is pressing against the smallest cog. Its hard to see. Its very close to the splined driver but I think it hits thee cog. This seems to leave me with two choices. One, make a shim. Two, a little filing on the derailleur. First I may try a little wet white on the side of the cog to see where exactly it hits and how much filing it will take. It is very hard to see or take a picture of it.

It tried to draw a white box around the interference area.