Bob, and as I have mentioned in the past, the 'ribbed/aluminized
cardboard tube,' you describe can also be collapsed, robbing your
intake of needed air. I had one that would collapse everytime I gave
it gas.....every Vanagon owner should inspect theirs!
Bob, have a safe trip back to SLC.....and more details on that rubber
fuel intake hose please.
Thanks,
            Miguel
29er? I thought I was the only 50+ guy riding a 29er......all ridgid
btw (I like saying that) and steel, of course...ha!