CEL came on a week ago, finally got the code read and it said something like "evaporative emissions control system, small leak detected" which I was told was fancy speak for fugged up gas cap. Bought a new cap and cleared the code. Two days later CEL came back on, I noticed the next day when I slammed on the brakes I could smell gas so I got out and started looking around. Looks like the rubber gasket that goes around the filler neck where it meets the tank is leaking. I ordered a new one but have never replaced one of these before. Is it a PITA to swap?