Just installed the NRF24L01 module on my Devo 10 and got the V977 bound to the tx, got the pitch trim feature working and also do note this is the newer V977 board with R2 model printed on it. The older model V977 board does not have the pitch trim feature if I'm not mistaken. I just replaced my main board as the old one died and this 'feature' also works with the stock tx, but only with the R2 board.