I think I have all the swagelok fittings, tri-clover fittings and solenoid valves to replumb my brewery in stainless for my automation retrofit project. swagelok tube fittings are all 1/2". There is an Ebay Store named Online Metal Supply. They have .049 wall 1/2" OD 304 Stainless Steel tubing for $5.33 a 4' length. It seems like a pretty good price. I also noticed that they have the same tubing in .036 wall for roughly double the price. Is there any reason why I should not use the .049 wall tubing? It would save me roughly $5.00 per 4' length and the ID on the .036 tubing would only be 13 thousanths larger.