I decided to post here because I recently had an issue with quadratec but they handled it perfectly. I ordered some bolts from them. The part number was correct on the package and on their website, but the bolts inside were the wrong thread pitch. I damaged one of the bolts before I figured it out. Confirmed with a thread pitch gauge and a tap that bolts were either machined wrong or wrong bolts were put into the package. I emailed them, they asked for pictures which I sent. They sent me a return label and a refund. I don't think they could have done any better.