The MarkIII wheels didn't fit on the JR racing servo, so I had to drill out the wheels, then mount them on a round servo hub.

The MarkIII kit is all together and after reversing the wiring to the IR sensors, it all tests out properly. I used BotLoader under WINE to get it to program under Linux. A fellow AHRC member (Bob Baxter) loaned me a sumo ring and gave me a blank one to paint. What a guy!