I'm looking forward to seeing what else comes from this post.

Can't the pressure altitude recorded in the log file be used? The
altitude used doesn't need to be accurate in the absolute sense (does
it?); rather just show the accurate altitude delta over the measurement
window.

On the topic of flight tests, I usually hear crickets when I ask this
question, but does anyone know where the Ventus 2 polar came from in
the SeeYou database (Tools | Polar)?

~ted/2NO