I have been changing optis about every 5K miles (due to cheap optis having bearing failure and not being able to find a decently-reliable reasonably-priced replacement). I can do the job in about two hours, but the biggest time-suck is removing the old gasket material from the water pump and the heads. I've been using the Felpro gaskets, which are paper, and which tear and stick to the metal upon disassembly. Is there a more-durable alternative, like metal or rubber? I don't care if it's not reusable as long as it peels off easily.