Well, that was one of the most dispiriting experiences I can remember in a very long time. I had the 3,500 RPM pressures within 0.01 bar. I had the ticker pressures matching and the ticker at 1,200 rpm. Off I go for a test ride and by the time I've done 4 miles the tickover is around 2,000 rpm. A sharp rev-and-release gets it to drop but only to ~1,500 rpm.
I have no idea what to do next and am rapidly running out of time. I have another option - get the F800GS MOT'd and use that. Knowing the GS after not having run since the Dragon Rally in Feb, it'll start first time. As I leave for the Stella Alpina on Weds night, that's the only useful option.