I was thinking about doing this skid as well. The main issue I have with buying a $100 skid for the evap box is that the evap box isn't critical. So you crush it or knock it off on the trail. What happens? Nothing. An annoying check engine light pops up and you go on your merry way until your state inspection or the light drives you crazy. Its basically buying insurance on a $300 item..only the insurance premium is 33% of the cost of a replacement. Is that crazy expensive? No, but its not cheap. Figure Apple Care costs $100 for a $300 iPhone so its the same thing, but I think my chances of shattering the screen or dropping my iPhone in water are greater than damaging the evap canister that many here claim is fine after multiple wheeling trips. Does it mean I wont do it? Nope, but it definitely has kept me from pulling the trigger so far.