510 mega carts

[Urban Nightmare]

Just wondering if anyone out there has found or made a 510 mega cart? Just took one of my 510 carts apart to clean everything and noticed how much wasted space there is near the tip. If you could increase the size of the reservoir you could vap on it a lot longer.

[ejoker]

tw has them (and a few other places), but i think you're required to also use their mega atty ...