I purchased three of the RP8D1 receivers. I programmed all three with failsafe and test flew each receiver. The receiver has very good range and flew with no discernable glitches. The failsafe worked correctly when I turned off the transmitter momentarily.

However, the output signal only has about 100 steps for the 1ms to 2ms range of each channel. The old non-computerized transmitter and receivers I flew in the past had essentially infinite resolution. Newer transmitters loose resolution in both the transmitter encoding and in the receiver DSP filtering. The RP8D1 outputs are in 10us steps. 1ms/10us = 100 steps. With my Futaba 9C transmitter, this means the RP8D1 will not respond to the first couple of steps of trim change (each trim change results in abut 5us change in the transmitted pulse width).

The receiver is fine for sport flying but if you have a plane with sensitive controls, you will find that when you give a momentary up elevator or down elevator command, the plane will respond as if your servos had lots of dead-band.

Actually they are not that common on ebay.com either