Originally Posted by rramjet

Thanks Marv.

I played with the electronics today including going back to the HPI RX and TX. No real help so put the HPI servo back in; still no improvement. Went back to the Spektrum Rx and Tx setup and changed the Tx frame rate to 16.5 ms the slowest possible and things are normal again. Based on my driving skills the slower servo speed is probably better but still need to figure out whats going on. Think I'll try the capacitor next.