I get one red line almost immediately (low pitch).
Then I quickly increase speed drastically (much higher pitch and force).
The second red line simply won't light up, no matter how fast I increase speed -- instead I get what looks like a solid blue line, not blinking. I guess this is around 8000 rpm. This is the first time I see the blue led, and it appears after maybe 6-10 seconds after the first red line, nothing close to 15-18 seconds described in the manual.
And as always, it never displays any scrolling figures.
I'll try to get a video for you at some point.