I changed my primary air filter and both Fuel Filters. I have 200 hours and a year on them. Its a 2016 1025. The fuel filters look good but my air filter was pretty dirty. The air filter I will change twice a year. Once at the beginning of spring and once during the middle of summer approximately.
I probably will change the secondary filter sooner and more often. I can't see what it looks like very good.
Just thought I'd share some pictures. I like pictures, and I know most of you do to.