Was screwing around and came up with this.... gives people a basis for ideas. If you get it successfully, you'll just need to send me a few!!!
The back mouthpiece of the 510 cart pops off with a paperclip or such. Once you do this there is another hole. Insert a pick of some type and this also removes. Now you can see all the dead air space in the cart! I heated my pick and punched a hole through the rectangular bottom of the liquid resevoir. I then took a cart insert (white piece) from an RN4075 (I think this is the model, aka njoy NPRO) and trimmed a very small slice off it with an exacto knife (razor). When inserted into the mouthpiece end of the 510 it sat flush. I pulled it back out and ran a ring of superglue (had no epoxy or silicone) around the lip of the RN4075 cart and re-inserted keeping the rectangular edges of both cart pieces lined up. Let dry and it held 29 drops of water. Then it leaked ;-(. Using epoxy or a silicone type material would work. This also would not disrupt the air path for taking a hit. Using this 29-30 drop resevoir with the ADM plug mod should work well. Someone give it a shot (who has the right material) and let me know!!!I have other ideas here in process. One uses the original end of the 510 cart and pops off to reveal an injectable resealing membrane for filling...
The back mouthpiece of the 510 cart pops off with a paperclip or such. Once you do this there is another hole. Insert a pick of some type and this also removes. Now you can see all the dead air space in the cart! I heated my pick and punched a hole through the rectangular bottom of the liquid resevoir. I then took a cart insert (white piece) from an RN4075 (I think this is the model, aka njoy NPRO) and trimmed a very small slice off it with an exacto knife (razor). When inserted into the mouthpiece end of the 510 it sat flush. I pulled it back out and ran a ring of superglue (had no epoxy or silicone) around the lip of the RN4075 cart and re-inserted keeping the rectangular edges of both cart pieces lined up. Let dry and it held 29 drops of water. Then it leaked ;-(. Using epoxy or a silicone type material would work. This also would not disrupt the air path for taking a hit. Using this 29-30 drop resevoir with the ADM plug mod should work well. Someone give it a shot (who has the right material) and let me know!!!I have other ideas here in process. One uses the original end of the 510 cart and pops off to reveal an injectable resealing membrane for filling...