BTW, all my fuel tanks have 1/8 copper tubes, feedline, overflow and uniflow.
After a certain time, copper tubes builds up inside and outside nasty green corrosion
which are very small parts and will "mix up" with your "clean fuel".
These small corrosion parts can block your NVA in a moment you dont really need (overhead eight) .
I am just to lazy to clean the inside of my tanks with Brake Cleaner Spraycan from
a Automotive parts dealer after each flying session.
So I use onboard filter and fuelcan filters (2) too.
Never had problems with blocked NVA.
BTW, if your engine goes lean after a few flights, your NVA might be halfway blocked.
I belive this hint is helpful for those which are looking for a small and reliable Fuel filter.
Peter