I took the car to the weighbridge -- it's 70kg lighter than before I started. The rear axle is the same, all the reduction happened at the front. Note the weights don't quite add up, 360 + 280 != 650, I guess this might be the weighbridge only having 10kg resolution.
I want to add another 100kg of cells, and it's likely I will have to put some at the front of the car, both to improve the handling and to reduce the rear axle weight.
I fixed my EVision -- last week I had the shunt installed backwards so it measured driving as charging and regen as discharging. My current economy is a little more than 1Ah/km, which gives me a range of between 30 and 40km with the small battery.
I'll make a more in-depth post about how much energy I'm using shortly -- I've captured a bunch of data from the EVision, but haven't got my head round analysing it yet. The instantaneous Wh/km readings from the EVision are difficult to quote because they vary significantly depending on whether you're going up hill or not. It needs a trip average function.
The only problem I've got is that my gearbox is sick, it's quite noisy and it gets hot. I believe there is too much preload on the bearings. If anyone knows how to set up an 80's Mitisubishi gearbox, I'd be interested in some advice.