Interesting. Thanks, i might widdle up a manifold all 1/4npt 3/8 fittings. Looks like i have 1/8npt on the manifold too, which prolly isnt helping.
I just added 2 more fittings on the head and out the scupper, easy to try. Will test tomorrow with a temp gun.
I am running 2 - 3/8 lines off...