Please don't get our wrong. We never intend to avoid the look at the attachment in the guide specification in AD .This is our responsibility to contact with. In the machine , it is a machine that we are setting it unfinished. When we started we have used attachment properly define everything as AD but a supervisor in the line that used to wrong sewing method and she also concluded that the machine unusable .then they have find out the ways to work .It is typical of our work. we hope you understand . And we appreciate your concern on this matter