[cas951]

From a shops view you have to look at this situation a little deeper than you just providing the parts. Yes it shouldn't take more than an hr or so to replace but there are other consequence the shop has to reconsider. If the parts didn't install as planned because of defects who will pay for the extra hrs spent on troubleshooting? If the parts break after 3 months of use who is responsible for the work to be done again? Simple things most shops won't mind doing for free or reduced cost but clutch is a different story.