Received TPMS and started the installation process but then noticed that the installation guide is nothing more than a photocopy written for the product above Costs $500, seems a bit cheap. Then, to top it all off, there are no operating instructions, only installation instructions and there are no screws. I am not sure if I will return the product. If I don't receive the manuals I need, I will return them to Revain. It looks like a 12 year old put together the packaging and instructions. I'll…