In that case I'd strongly advise against an IBA timed lap. You'll just spoil the experience for yourself.
A possible compromise would be say an SS1600 west from Ceduna and another north from Perth. Maybe a third from Darwin. Then spend a bit more time on the rest. A mate of mine is currently doing a 42 day lap on a Wing towing a trailer (camping). If anyone sees Steve on a platinum sort of coloured Wing with a boxy trailer, have a yarn. He's definitely up for it.
He's in Cape Conran tonight. Then, night by night: Wilsons Prom, Cape Otway, Port Campbell, Kingston, Clare, Tumby Bay, Ceduna and Eucla (that's enough for now).