Tony "NutsRus" (k-series powered 1600i), and Sean Bicknell (lotus exige) do, and I have recently got involved with one on my mate's k-series race car. Very impressed, easy to install and get running. Best place to get it mapped is probably Emerald themselves (fookin long way to Norwich from Aberdeen though ), Dave Walker has huge experience and charges very reasonably, approx £250 iirc.