Jiffy

My apologies if the above creads a bit negative, it is not intended to be, I was just a bit shocked when I saw the manifold. I could have worded it better no doubt.

​The issue with the manifold you have is only if something is dropped and hits the regulator or the pipe running to the regulator. The leverage you have could shear both fittings off at the cylinder valves (assuming you used schedule 80 screwed fitting and 3000 lb couplings, which it does not look like, if not any of the threaded sections could let go with the reduced wall thickness.) This could potentially result in unrestricted flow from both cylinders into the shop... if the forge is lit, god help you and your family. Best of luck with that. The correct way to manifold them would have been far cheaper and safer. Use a RegO 1450E (simple tee piece 1/4 mnpt x 1/4 inv Flare) and and two copper pigtails. Mount the regulator on a fixed location. copper pigtails (heavy walled and designed for Propane at cylinder pressure).These connect to each cylinder. The flexibility of the copper will make your life much easier. Cost would be well under $20. As an added bonus, instead of about 14 connections at full cylinder pressure which could possibly leak you will have reduced it down to only 5. Much less risk. Much safer. Just my two cents for what they are worth.