Well, the 901 is pretty short except for the mouthpiece so....
All this mod does is make the cart shorter for carrying convenience and give you a window to see the wick. I does lighten up the draw a lot though too, it's like smoking an analog with the this cart. Obviously, this holds a lot less juice now.
The pic of the 901 is with the modified cart installed. The actual cart with the window is the finished cart, and the one installed with the black end is the prototype.
All this mod does is make the cart shorter for carrying convenience and give you a window to see the wick. I does lighten up the draw a lot though too, it's like smoking an analog with the this cart. Obviously, this holds a lot less juice now.
The pic of the 901 is with the modified cart installed. The actual cart with the window is the finished cart, and the one installed with the black end is the prototype.