Need some help. Might be loking at a Wheeler and Wilson coffin top treadle on SUnday. Currrent owner does sew but prefers modern to vintage. There are 2 machines and a buunch of attachments and she has no idea goes with what machine. I also have no idea what to look for. She thinks both machines may be great grandmother's machines. Are there any pointers I need to know about a W&W machine and what would I look for regarding attachments?