As has already been mentioned, replace the Reliable with a UFP. Assuming brakes are properly bled and adjusted (adjustment shouldn't be required since they are disks), sounds like the shock absorber in the actuator could be shot and not dampening the movement as it should - PARTS ARE NOT AVAILABLE. I was having the same issue with my 06 X30 last fall. Switched out for UFP and problem solved.
Last edited by Skyskiguy; 10-09-2013 at 01:47 PM.