I just bought a used Pfaff stretch and jeans machine and I have found two issues I need help with. One, there are no seam guides on the machine, any suggestions? Two, the metal throat plate sticks up just enough to catch the seam allowance when I'm sewing over a seam, I would just put a piece of tape to cover it but the piece that comes off for the free arm is right at the end of the metal piece. I have to take the tray off to change the bobbin so I can't really use a piece of tape there or I would have to change it every time I change the bobbin. I love how the machine sews, these are the only two issues I have found, I would appreciate any suggestions.