I have found that on this coach I can access all filters with four screws each. Filter access is not so bad that I consider it an issue.

I intend to wear them out at the same time because I went through that with my original coach and did replace all Cruise Airs at the same time. I would much rather replace them all simultaneously when the first one pukes than wait and get piecemeal replacements. 15 years seems to be a good life span, and although we are close they are doing well.