Did you try putting the bottom of the SS one on the black top to rule out the top piece?
As a matter of fact i haven't,but that sounds like a great idea,definitely help a bit with chasing down the issue.I do have it alot better now,after blocking all the air holes and giving a really hard primer draw,it seems to be getting better,so i think something is partially blocked somewhere,and maybe the hard pull moved it a bit or something.It takes maybe 30 seconds or so now to resaturate verses the minute or so before haha,so i'll give your idea a shot and see what i find out.