Thank you so much for all of your help.
I acknowledged Mr.Buncha to Kohler's proposals.
We'll gather the defective item and send them back soon.
We need "The old version" of both Elevators and Scissors.
We understand that their materials were shaped by hand so it might have some problem to get steady shape.
However we have to keep our quality as much as we can.
We hope Kohler will give us the credit note for the defective item.