one side is faster than the other going up, and dealer says there is a leak on one of the cylinders, he suggests doing both, plus bleed and adjust(2001 Cobra).....labor is gonna be $460(sounds a little steep even for the dealer).....Ford stopped production of the parts so I have been looking around and found anywhere from $90-150 online.....is this something I should tackle myself or if I have it done, should it be from a top-shop or just a mechanic.....any experience would help......