Only one way to handle that, and it's to keep the brownie point account in credit. Might I suggest that your machine is capable of turning out, at a moment's notice, wooden templates to use for cutting fabric with a soldering iron (and a couple of these were gear wheels), a range of stacking wooden trays to hold more reels of cotton than you could believe exist, and a small wooden pot to hold a wad of steel wool (don't even ask). Regrettably, none of these projects has needed bevel gears but I live in hope...