I am so sorry to make you feel disappointed.It is also MCC's goal to achieve cost saving as MCA like.We did the test immediately as we received the T3 sample and completed within three days.We are support you work fully and we are a team!We think the test method that MJ provided is clear and not difficult to understand.Besides,we are concerned that recording the video would against MAKITA confidentiality rules. We hope supplier can do the test before T4 sample be sent to MCC especially cold resistance test.If they worried about they have something to do wrong during the test ,they can send a record(a video or a report) of the test process.MCC will check it and give a feedbackAttachment is the test report and test method.About test method, which part make supplier confused ?tell me more details please