It may not be a B777 problem as such ... but does anyone know how to configure the reverser+throttle combination for the X52 Pro?

It's as if MSFS isn't treating the throttle input as a fully linear when the reverser is activated. It goes fine up to around 50% throttle then disengages when in the 50-100% range.

In the FBW A320, I can calibrate the throttle via the EFB and it works correctly.

The same combination works fine for turboprops reverser - and (I think on other airliners).

I've also tried various experiments with FSUIPC, but no luck.

Any ideas, anyone?