I just got a "slow leak" flat on my Specialized Hardrock. In the past, I've always taken my bike to the shop and had someone there take care of it. I've always been afraid I'd do it wrong. But now I'd like to try it myself. Now the cost of innertubes have gone up considerably, so I'm thinking of patching it instead. Would duct tape work? It seems like it would be strong enough, but I'd hate to try it, only to be caught miles from home with a flat. But would it work?