So I took my MC21 to the shop for an overhaul after it had been sitting for several months. It was running alright but idle wasn't great and needed some fixing in other ways. I knew a bit of rust had accumulated in the tank. He sent me these pics and said it will cost a lot to go through and fix all rust damage. My question is this: how bad can it be? I trust him well enough, but if the worst case scenario is something I can fix myself I'd rather save the cash for fun bits.
