I have an idea on a no filler cartidge mod. I took a plastic end cap off of a regular 510 cartidge and placed it inside a mega cyclinder atty cartidge. Now it fits almost but there is a little gap. I am wondering if superglue could be used for this? I am worried about the fumes from the atty getting hot. If anyone has a suggestion about glue or some other thing I could use to seal it off, that is heat resistant and non toxic? This mod would work by poking a small hole in the plastic in the center, making it drip by gravity, and would be sealed refil it just using a syringe, anyone else tried this?