For the Mark 3 model (that I am only inventing in my mind) a nice feature would be a dial or DIP switch on the sled that is wired back to the connector and which let's you assign a unique ID if you have multiple sleds -- home=0, car=1, boat=2, car2=3, etc. and allows persistent settings for each sled

Why wait for the Mk3 the mk2 already has this when the radio module appears.

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P.Allison fixer of big engines Mk2+Mk2a signed by God / Hacked by the Lord Aberdeen Scotland