The ECU tuning software is available for Linux and Mac. But I think my having to learn a third operating system just for this is taking things a bit far...;-)
As regards high speed tuning, my intention is to get it running well enough at moderate speeds and get that done on a rolling road.
I did in fact get it running ok and took it for a short run. Satisfactory enough so I can screw the ECU in place and tidy things up. The software is pretty complex and the instructions written for someone who understands fully the complexities of injection tuning. And that's the idiot's guide.