Another step closer...
Finished the formwork this morning. The plan is to pour it next Saturday. It'll be a Ready-mix job, I'm not going to mix that much in the mixer without more help than I'll have.
The slab and pier footing are oriented true N-S (within probably +/-5° for compass reading and set up errors). To orient your self the long timbers over hang the formwork on the Northern side.
Al.