im posting this cause i couldnt find a post where it has been succesfully tried i tried taking the filler out of a carto after reading about it in another tread and i thought it was glued or somthing cause it didnt want to come out i guess it was stuck on part of the atty but last night i pulled the filler out off a slightly burned cart still the flavor was gross. it came out easey i was still carfull to pull evenly all around the cart. once it was out i cleaned with alcohaul (the atty) then with water. then i cut the ptb on three edges to look like a sheet of material like in the 510 ptb mod. i folded it long ways like a rolling papper also like the 510 ptb mod but then i fold it short ways to resimble the size of the original carto filler then i wraped it around an alen wrench to make a toob and then i made a few small cutts at the top of the rolled ptb in the direction of top to bottom but only like an 8th of an inch down this may not be nessisary or it may be better if the cutts are longer ill have to play with that aspect but then you carefully slide it over the atty the way its folded it will stick up further than the atty but dose not seem to affect it like i said ive only had the carto going since last night but it seems to hold a little more juice i started with 18 drops took a few drags and thought there was a funny taste so i put a few more drops in and it turns out the funny taste was from the new juice i was vaping cause i relized the funny taste was in the other cartos. it even seems like i have to top it off a little less often and theres great vapor production and it turns out when u need to top it off you get the same change in flavor as the original filler im sure some one besides me has tried this so please post your findings oh i almost forgot the flavor realy stood out with the ptb but the draw is just a little stiffer but not bad ill update this in a few days