stacked gears for quick change gearbox

if you have an old imperial hobby sized lathe and would like to make either a light duty gearbox or make castings for metal gears then these along with a few of the original sizes will be handy to have about, the original designer supplied the gear set as individual gears to my specs and ive combined the gears to make the compounds here to make life easier for everyone else, check his thing out you will need a couple of other bits from his design and if you want the rest of the information the a