Originally Posted by condac

The RX and 4PX I tested had 3.0ms servo update and not 3.3ms as the 4PK. So a little increase in the Hz. And digital servos can handle the update rate.

I am meting a friend on Saturday with the little older M12 and I will get the chance to test it to compare. Also a friend with a MT4S.

I will borrow a 614 fasst rx to do direct compare with 4PK, and also create histogram of the 4PK and the sanwa radios.