I have a remote filter kit that has 3/8" ID fittings, and a length of 5/16" hose. The hose will push on the fittings, but it's very tight and seems to be too small. I'm concerned the hose will split. My thoughts are that a 3/8" hose would be a much better fit. I also have an old ATF external cooler kit on the shelf, and it too has 3/8" fittings and 5/16" hose....it seems some mfgs ship their kits with the next smaller sized hose. What size hose do you guys use with a particular sized barb fitting?