Video 2:
https://share.icloud.com/photos/0ab7ceXuASwNtT1ps3XQC9BoAI didn’t hit record on time, but the needle very slowly rose to its position when the video started, and then you can see it climb a bit more. Seemed to be sort of leveling out at 12 mph.
Weak magnet or friction/ resistance somewhere in the system?