using xtreduded material like the vision extreme line for the stardust is very difficult, as oyu can see china has opened there hearts to using the newer plastic, its in dct tanks, its in all fluxos, its in all vision extremes and also products like the sapphire and the phoenix(oops)
but to extrude it in the shape and then to have it sit properly without leaks has been difficult for them, they tried and had issues, if it was that easy they would of done so at the start, the same applied to the vision stone once you cut out the threading it weakened the tube drastically. Now they are informed and know what people want and are looking into solutions, and as you can see they are more then willing to improve, we got new ohms, we got new colors, we got improvements with the new metal prong.. so in time more improvements will be made when they can.