These are taking place in western Australia.. Maybe things are different but there are no sleep controls
This second 600k was fully unsupported.. You decide whether or not you want sleep, and then it's up to you to decide where you want to stop, for how long, what kind of sleep system you want..
I had heaps of mechanicals (2 sidewall failures, 6-7 flats, patched 3 tubes, lost a bottle cage off my saddle bag mount which had to get mcgyvered back on at 11pm..) I ended up covering 370k by 1am, sleeping until 5:30 and then doing the remaining 230km on day 2
26.5 moving average on a 600k / 5700m route. Not bad!