Hi folks, and thanks for your best wishes. I am back home in one piece after completing the circumnavigation, and I can thoroughly recommend it to anyone with a Model 3 (preferably with the 75 kWh battery) and a month to spare.
Just got my Model 3 repaired by Tesla - back side window replacement after someone decided to smash it (robbery) while in a supposedly secure car park in Broome. Had to make up a polycarbonate replacement to get me the 7,000 remaining km (about 4,000 miles) back home. It worked, but its very nice to now have a complete, secure, weatherproof car. The Model 3 held up brilliantly: nothing went wrong or needed replacing (other than that pesky window - not Tesla's fault) and the car, now that it's had a wash, looks immaculate.
I will add the last bits of Highway One (across Tasmania) in January.
If anyone is thinking about this trip, the last entry in my Blog ( teslamodel3highwayone.wordpress.com ) is a summary of all the lessons I learned over the trip. I wanted to put it out there so that anyone thinking of the trip starts already knowing what I know now. It should help lower the barriers to someone thinking about the trip...
And thanks Blue Heaven for your introduction and putting this thread together.