I don't think it is possible to determine if the original image suggests a single body, 6 bodies, or even 10 bodies (4 hidden on the backside).
With my Linear Patter solution I had to leave individual bodies. I think Grisanin's excellent solution can still be done in a single feature, and have a single body. The sketches just need to be drawn a little different so the extrusion is allowed to overlap itself a little and prevent those "Zero thickness" errors.
Good work on the different solutions. I like to see that there are different, and often better solutions than the one I come up with.