Hi folks. I bought an Adler 105-64 yesterday; it had been in storage for years. The bobbin pops right out after a few stitches.I thought it might have to do with the bobbin case and change it but the same thing occurred, this time breaking the needle! I suspect this may have something to do with the timing. Does anyone have advice/suggestions for me, please? Also, will a speed reducer work on this machine? I make mainly belts and need slower speeds than what the motor currently offers.