How to install valley for a Metal Roof... Every cut in detail

Tools needed: Midwest snips: https://amzn.to/3rB99A9 Dewalt Screwgun: https://amzn.to/3d05HLs The top joinery of both valleys when they meet on the same plane of roof is shown here. I have my valley custom made with water trough to help with leaking but all techniques shown can be applied to any metal valley applications.