I like the idea of doubling the range, but would prefer a beefier internal battery. I run the 375 kWh battery to totally dead in 1 hour tops. In my opinion the Eco mode just makes up for the added weight and if you want to fly you need to be in trail, which uses up the juice quick. I also...
Has anybody thought about DIY-ing a battery for the Focus line? The TEC pack is expensive and doubles the battery weight. With the addition of 10 more cells you should be able to get 500 kWh. The current battery configuration seems like it could be easily improved on for a battery savvy do it...