Great and helpful post Phil. I received my 1A Tow mirrors today and must say I'm a bit disappointed. I'm removing the DL3 full function sport mirrors on my 2016 Silverado Z71 LTZ and replacing them with the full function 1A tow set I purchased that I thought was a plug and play replacement. After watching your videos I realize that is not the case. I knew I would need to hard wire the marker and courtesy flood (or back up) lights but after watching your video feel your customer harnesses will make this task much easier. How do I go about purchasing your custom harnesses (I see no place to order?) and are you confident I won't lose any full functionality features utilizing your product? BTW, the 1A mirrors came with no extra wiring or stud mounting hardware. I've contacted them via email to ask if this was an oversight on their part but I'm not confident Ill even receive a reply from them. Best