At one point last year HP was providing a kit to "fix" that problem on a series of printers - my LJ1100 was covered, not sure about the 5. But HP sent the kit for free, no shipping. It took about two minutes and I've had the printer going for about a year now since the fix with almost no feed problems. The problem was without question a design flaw on HPs part, hence the free fix. Check the HP support site to see if the kits are still there.

Good luck,

Bruce