Great ! Those wheels could have saved me twice in Paris and DC.
One way to test:
Go to the gym and ask permission to use an high speed treadmill.
Secure the area around in case the board is ejected.
Secure yourself (full protections, grab the bars, safety harness to the ceiling ??)
Sign a disclaimer.
And accelerate until nosedive.
If someone is both a stuntman and a geek it could be interesting to open the board and clamp an ammeter on the motor cable to log the nosedive Amps.
Still unclear to me if FM has all the info and did not manage to make it work.