About to do this In a couple of hours and now I read mixed results about using brass compression fittings? Is there a problem im unaware of between brass not staying tight with stainless steel tube (whitch im using) or brass combined with ulsd? Im reading different outcomes on both and would like to get this kicked out before work blows open tomorrow.
Brass will not bite into the stainless steel like it should to make a tight seal. It's basically like clamping a hose onto a smooth tube with no barbs. Sure it will probably hold if you tighten the snot out of it but then you stand the chance of the brass cracking with the different metal expansion rates.
HAha I know they arnt cheap. For what it costs for 2 fittings Is more then it costs to do the whole mod. Im going to go with the zinc plated steel (as I didnt get to the mod yet due to running out of time) as there 16 bucks for both fittings and bite into stainless and steel tubing.