Hello Fastnet,
I've done the same thing as you: I puled out the three fule pipes on the top of the filter assembly and the sensor on the bottom.
I tried to open/unscrew the meatalic housing filter to put the "paper filter" inside but I can't do it.
I don't know if I'm missing some thing here !!! but plz somone can answer these 2 question:
1) We have to replace all the metalic fuel filer (filter assembly)
2) We can change the fuel filter inside the filter assembly... in this case how we can unscrew the matlic housing filter ?