Resolution as in bits that each rx can process. Fasst supposedly = 2024 vs SFhss = 1024. It's a mute point though. When I posted that I was at the track, so I put a T-Fhss rx in and it was night and day better than my Fasst. My lap times instantly were much more consistent (on the low side). It was so much easier to drive the car.

I assume that even though the minimum latency of the M12 vs the 4PX are virtually the same, the M12's better average latency, along with it's better frame rate makes it feel a little more connected. The M12s should be even better.

It will be interesting to see if a firmware update to the 4pX for the use of the new SR receiver will see a boost in frame rate, and reduction in latency?

Can you test an M12-S? After experiencing how much easier it was to drive my car with the T-Fhss Rx, I can see why people like the M12/MT4s/M12-S lineup. Futaba has some work to do.

With that said, it does look like the latency average and frame rate issue should be relatively easy to fix. Hopefully for us 4pX owners a firmware update to the new SR Rx spec will move us past the M12 at least.