jonathan18: ... with our Leaf being basically 10% out across the range.)
Yip, the Leaf is 10% out w.r.t. the speedo. You have to be going 110km/h according to the speedo to do a true 100km/h. To do the legal speed limit of 50km/h, the Leaf speedo has to show 55km/h.
Having said all of that, most likely duckInferno knows that by now?