This maybe a stupid question however I never changed tubes in an amp before and I'm a bit nervous since this is a 1500 amp. I have a dual rectifier 3 channel. I ordered the Mesa High Gain tube kit from Eurotubes.com (awesome site btw). It comes with a quad of E34L's. Is there a specific order to put the Quad in? Or since it's a Quad it doesn't. I've heard with Matched pairs you have to put them a certain way. And also should I change the fuse since im changing the tubes. I bought the head in '03 and I haven't changed anything on it. The tubes and fuse are stock. Thanks.