Also, usually machines not designed with Product Link will not come with mounting points, so technicians will need to check where will be good mounting points on the machine. There is a guide on dealer.cat.com to tell you where to avoid, like to avoid hot areas on a machine. However, it will still depend on the technician's experience to find the best mounting point. Some manual drilling may need to done to create the mounting points. Khun Jakkrit has done retrofit on 777D, ask him to share his experience with you.