MisterTJ,
Good job, you're on to it! You know all the filters and as Pawel said, start with the easy ones! My fuel tank screen came out easy the first time I did it, but every car is different. The first time I changed my main filter, a couple weeks after buying the car, the canister was 1/3 full of rust!! Clearly, I had fuel tank issues and the previous owner had maintenance work issues.
I can't wait to hear your findings. Best of luck.