I am a new member here, thanks for having me. I am working on some repairs on my daughters grandparents 1992 240sx convertible. The hydraulic cylinders for the convertible top are leaking. I have found replacements for the cylinders but I am curious if anyone has had luck rebuilding the old cylinders? I am an industrial maintenance manager with a lot of experience rebuilding/repairing hydraulic cylinders but I didn't want to take them out and waste time on repairing them if it isn't possible. Any help would be greatly appreciated.