I have been pouring over this issue here. Having a near 200k 4.0 2002 I know the repair is coming. Does anyone have pictures of guides prior to destruction detailing major contact points? Understanding failures are due to lack of reinforcement, plastic involved, etc. I would like to see if it is possible to reengineer this. I am not at this point trying to sell anything just have resources. It may be cost prohibitive but I have access to state of the art technology we use to replicate/improve parts for vintage Ferrari, Maseratti, and other Italian cars. There will obviously be a need for stamping of metal reinforcement and have to work on suitable composite guide surface. We have access to retired DOD liquid 3D printers and CAD welders to develop prototypes. Should something come of this I want Admin to know I will gladly pay as sponsor. I just need as much information right now as possible on these guides, break points, etc, and heavy wear points. I am in same boat and it will cost a ton to prototype this. However a guide that may wear to 150k but prevent destruction is goal or longer if preventative tensioner replacement service done. Thanks for any information. If it has been done, tried, or failed please point me to thread. John Yes I may be crazy but my wife loves the truck.