I found the tube at home depot that you told me about, it is like .040 thick though, pushrod should fit if not I will trim the tube down, easier than I thought.
I don't have a flow bench, so I quite possibly could be hurting them, but I doubt it. When it is all said and done I will take them to get flowed, but this dude wants 20 dollars a hole, that sounds like b.s.