Wow, that KK price was an absolute steal. The added bonus of the road machine is that if you don't have a PM, the power curve is really stable and doesn't drift as the fluid heats up. So virtual power numbers are consistent.
On a side note, I've been pissing around on Zwift for a few weeks now while I've been unable to ride outdoors. I must admit it's grown on me a bit, but I still think it's not suited to structured work. Too many distractions. I'll be back to Trainerroad (with loud music) for the rest of the winter.