Hey, can I ask a question about my hand-crank machine? I can sew for about 15 minutes before the screw holding the crank comes loose and it starts clunking loudly (and would fall off, I'm sure, if I just kept cranking!). Is this just something that usually happens with the cranks? I keep a screwdriver right next to the machine now so I can tighten it up when this happens, but it's kind of annoying.