Hello, my express nc-50 has a very rusty gas tank. I ran about 200 miles with it since i got it and had no troubles. But i'm pretty sure its only gonna get worse. How would I go about getting the tank off without screwing anything else up (gas line, wires, rack, exc.) and cleaning the rust out? I'm really all about the "if it ain't broke, don't fix it" theory, but i think this is something i should take care of. Thanks.