You're the second person that has told me a sleeve is required. I don't have any spare tube so do you have any clever ideas on how to fabricate one with something that may be lying around the house or could be had at the local hardware store?
You don't need a sleeve if you can live with the repair being a larger diameter than the tube. If you plan on sanding the repair away to make the tube the same consistent diameter...then you need a sleeve.
My method makes the sleeve external around the fracture.
