I decided to rearrange my air line at the main bench, and while at it put in a pressure regulator (pinners want lower pressure). Went looking on Amazon, got fooled first by "air regulator" (turned out to be just a ball valve, advertised as flow regulator, waste of money) before I found this: https://smile.amazon.com/gp/product/B00IDCYKEY/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1. At just over $10, it's really inexpensive. Has metal bracket, mounts to wall quite nicely, and also acts as shut off. Instructions are backward, but I think that's because it was made 180 degrees around the world? Anyway, nice piece.