This VX110 I just bought came with too much oil in it. I want to check to see if I need to replace the air filter before I take it out on the water next season. Is it just those four screws that hold the air box on, or is it more complicated than that? Plus I'll have to get an angled screwdriver to get in there as well. Is this easy to do? I have the tech manual, but couldn't find detailed instructions on how to do it. Thanks.