I have now made board skeleton #3. I'm getting quicker!

I'm getting used to the process, improving my working methods (e.g. using a longer fence on the table saw to get long straight parallel cuts in the boards) and simplifiying the construction by relying more on glue and leaving out some fixings.

This is how the three boards will be arranged with a bridging section where the 6ft level is to form the roundy-round circuit.