Dr Honda is nearest. It should never be thought of as a filter, its like people who don't fit filters because of having a UAT!
Its biggest plus is the sponge affect and it allows moments out of the fuel with fuel being drawn from the felt (like in a low power dive) Tillotson clunks need the centre hole drilling out to 2.8mm, or we use our two sizes of Hi-Flow clunks.
The thing with most dubro tanks is that they are long and thin, so a felt clunk is ideal.
(Before installation attach a piece of tube and suck the loose fibre out and they run for years without issues)