YEA MAN.........iv,e seen that foam crap get through 2 filters'' just as tiny little specs ''......but STILL enough to cause problems!
I mean ,the foam is SAFETY based anyway , like how an aluminum or steel tank has baffles or chambers ,so when you take it out youre fuel is gonna SLOSH around like crazy,
and if you have a BAD enough crash and BUST the tank apart, the foam is supposed to keep all the fuel SOMEWHAT in one BLOB AS IT FLYS THROUGH THE AIR
I have heard that NASCAR runs some kind of plastic bladder in their cells,that supposedly even if the cell GETS RUPTURED...........the bladder will not...
I ran a 16 gallon plastic cell ,with the pickup in the back, & NO FOAM, in my zuki ,and never had any problems with it ,for 5 years.