Thanks for your interest. The most important mechanical mod I could make in the xA is change out the 4.31:1 final drive with the 3.56:1 unit -- the revs are way too high at highway speeds. This would be about 17% drop in revs, at least, and the fuel savings could be 10%? If I can afford it, when/if it needs a new clutch...
I need the backseat because my 2 kids and sometimes all 4 of us drive in my car. And I've had several punctures, so I couldn't go without the spare, either.
I would love to be able to redo all the Coroplast and tape mods with fiberglass, so they both looked better and worked better, without the maintenance. They have survived several years now, and in the winter aero mods are even more important, because the air is denser.
But, I am hoping to get started building my CarBEN EV5 electric car:
http://ecomodder.com/forum/showthrea...ter-11969.html
Also, see my blog linked in my signature.