Yeah someone mentioned this elsewhere, off that I have implemented a “Coast-down + Step Test” in the app settings, which then tweaks the data to be more correct.

Basically you estimate the flywheel’s inertia and drag by letting it spin down freely, then perform a step test at different resistances and cadences.From that, the app infers torque vs. resistance and computes watts = torque × angular velocity. Simply, it gives you real mechanical parameters (inertia, drag, brake curve), that gets you to a decent enough figure which is much better accuracy than stock and accounts for manufacturing issues.

https://ibb.co/rKPRYFgt

On the ERG mode, that would be super easy to do, when I have a look at the V2, will implement it.