I bought an older Sioux Air Drill with the 1/4 hex shank quick disconnect tip. It works great, but I am having a hard time figuring out how to get the usual 30 and 40 drill bits to go IN THE DRILL??? Can I buy the 30 and 40 size drill bits with a 1/4" hex shank or do I need some sort of adapter? What would be best? What drill bit tip should I use on aluminum sheets / skins? Thanks. It would be cool to have the drill bits attached to the hex shank, anyone know a good source of quality drill bits for hex shank in the wire gauge sizes? Online? In stores?