Accoring to Calculate usable battery capacity based on rated miles values "Original 60 - ~61 kWh total capacity, ~58.5 kWh usable. 85/P85/85D/P85D - ~81.5 kWh total capacity, ~77.5 kWh usable 90D/P90D - ~85.8 kWh total capacity, 81.8 kWh usable Original 70 - ~71.2 kWh total capacity, 68.8 kWh usable 75/75D - 75 kWh total capacity, 72.6 kWh usable Software limited 60/60D - 62.4 kWh usable Software limited 70/70D - 65.9 kWh usabl " and 100D is 102.4 kwh total and 98.4 kwh usuable The myth of why 90D to 100D upgrade can get more range than 75D to 90D upgrade is resolved: actually it is adding 9.2 kWh (for $10000) vs adding 16.6 kwh (for $3000) but the average mileage per KWH is less, i.e., less efficient. Model X 295/98.4 = 2.9979 257/81.8 = 3.142 237/72.6 = 3.264 So if you have to charge at home every night, you actually have to pay more over time. Somehow the 90D with FUSC is a good balance between range and efficiency? Still hard to decide whether to change order or not and the deadline is so close. To me a $500 fee is required.