Looks good, there should be another bush on the end one small on larger, check to see if its stuck it exhaust.
Make sure cables move freely, run some 3in1 down them.
If cables are totally knackered send me a msg I can link you to parts to replace inner very cheaply.
Have you got the servo motor in place and plugged in, if you have and its working you wont get servo fault on rev counter.