I have just been invoiced for a faulty quick coupling the same from WINTEC. The fitting keeps coming loose I had not even used them yet as I did not have a back pack at the time. .I THINK WE ALL NEED TO TAKE note of the inferior product we are been supplied. This company has a bad attitude to its customers. They start telling me what I will have to pay and how I must protect it before they have even seen what’s wrong with it .There postage is also excessive as I paid 90 p to send it to them by post and they charge me 495 p to post it to me. Its not just is it. I will be thinking twice for I spend my cash with them again.