History
NA series MX-5 converted to pure battery electric drive by myself and many friends, but in particular Mike Van Emmerik and Jeff Owen.
First registered as electric in October 2013. It has a range of 130 km easy, and recharges overnight.
Still waiting for upgraded motor controller that should give 120 kW.
See http://forums.aeva.asn.au/topic980.html (long version)
Modifications
Converted to battery electric drive. See http://www.evalbum.com/2507 (short version)
Upgraded brakes and differential to NB series. Added MX-5 Plus rollbar and Yellowspeed coilovers.