Don't know if this has been posted before, but I was tinkering with a Leo carto, and found that blue foam works VERY well in place of the factory filler. 
I was ready to pitch this particular carto in the trash, and decided to carefully remove the filler, and have a look. I then rinsed the carto out, let dry, and installed the blue foam...
It vapes quite nicely. 
I was ready to pitch this particular carto in the trash, and decided to carefully remove the filler, and have a look. I then rinsed the carto out, let dry, and installed the blue foam...


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