I'm broke and interested in making a bike lock myself. I live in a college town and bike theft isn't a huge concern here but all I have now is a *** cable lock and was thinking of making myself a kryptonite esque chainlock. I thought I'd buy a reasonably light/sturdy chain from a hardware store and getting some really thick like canvas type material and sewing it to fit around the chain and then getting a decent padlock. Is this a really bad idea? Someone help me decide whether or not I should do this.