Esshup is right, LB sorry I didn't mention that with the gauge. If you look back at my pic my gauge is from Bill Cody it's a liquid filled 30psi gauge. 100 is way to high like esshup said it will never register. I wonder if you could maybe zip tie a small 2x2 or 1x1 under that manifold for support? Just zip tie it around the wood and around the manifold itself to keep it from bending down eventually...
RC