I have just bought a fuel super lite tank 1.1L (68/45). Extremely small for a 68/45, the smallest on the market and the lightest bar none. Made my Guerilla Air 48/45 seem heavy. They have a stainless steel liner so no bladder like the stakkos and can be retested. It comes with a Ninja reg which is the icing on the cake, fully adjustable output pressures and very easy to service yourself. I have run Ninja regs for a long time and never had any problems with them at all.
For me it was a no brainer as soon as I compaired with any other tank.