Fuel smell from slosh?

[Mr Nick]

I have noticed a few times, when slowly pulling in/out of a steep driveway, I get a minor fuel smell. Noticed it a few times this winter while climbing in and out of the trunk installing my stereo. Tank is filled to the max for winter storage. I'm confident the smell is not fuel seeping thru the lines, I read that whole other thread.

I'm using a Tanks Inc tank, with their drop in pump assembly, and rollover valve/vent.

Is there a simple inline charcoal filter I can install between the tank and rollover valve first, or so I need to spend the big money on the Finch or II Much breathers?