I replaced the hydraulic as well as fitting and extra bolt inside the mechanism. It worked prefect for a few months then went back to as it did. As mentioned in a further comment not sure if it's got cold now. The only thing I don't like is it tended to "bounce" when fully open, wondered in time if it would damage the mechanism. So up to you if you really want it. I purchased all the items off a well known site with Bay as the end word.
Huddy