Got my call from Tesla and you cannot upgrade to a P100D only to a P100DL. Makes the upgrade from my P90D (was planning on waiting six months on ludicrous) to a P100DL over $50,000 so about $30,000 for 10 kWh, the pure cost is over AU$15000 plus LCT and on roads. Just cannot justify that with the build out of superchargers and three phase nullifying the vast majority of the benefit of the extra 10 kWh. Maybe in a few years I might plum for an upgrade once the cost of batteries comes down and a pretty big upgrade is available. The new battery format may yield better range and they may tweak it again in 12 months to be even better and prices will comes down once the GF is online.