If you feel those items, and others, are important for an annual, just add them to the list. I have added about 1/2 dozen items to my checklist.
The fuel filter definitely needs to be added if it is not part of the engine 100 hour list.
I personally don't check tank finger strainers; they are very coarse and if they ever start to plug up there will be early warning in the fuel filter. They are also very difficult to check for no good reason.
Spar hinges have never been a problem area.