I have a great old bianchi lugged steel road bike from the 1980's, but there has been a disturbing development. It seems to have developed a hairline fracture in the bottom bracket lug, about an inch and a half horizontally (i.e. from the left crank towards the right crank, right on the bottom). What is the prognosis for my italian beauty? I know that it's unsafe to ride a cracked frame, but do you guys think I'm in imminent danger? I have a co-worker that does some welding, and I'm thinking of seeing if he'll repair it, but he knows nothing about bikes. Would he be able to accomplish this? Any guidelines I would give him? How much would I expect to pay a bike shop for the job, and is this the right solution?