So, my Moby is leaking gas at an alarming rate and I'm pretty sure it's due to a small breech in the gas tank. I've yet to pinpoint the location, but when I do, how can I fix it? I don't have any welding equipment, nor do I know how to weld. What about that "welding" putty stuff? Could I use that as a long-term solution or would it be more or less temporary? Could I use it until I have time to take her into the shop?