New Designz Thread Saver On-off (NDZ TSO) Review 
i just got mine in the mail and all i can say is.........ITS TEH ****!
probably one of the most ingenious ideas ever for paintball tanks!!!!!
its makes any screw in tank you got an on off tank, much like the Centerflag 420 Slide Valve, but much cheeper and portable on any tank
from the pics here
NDZ V1 and V2 TSO?? - PbNation
you can see that the dial pushes a rod down which is connected to a pin in the TSO which pushes tank's pin valve open
this thing is perfect for:
- players who want to not buy an expensive on off bottomline ASA but still have on off capabilites
- players using 13, 48 or 72 ci tanks and need extra length
- invert mini, SL-68(I&II), ie any gun with a built in bottomline ASA
- myth reg owners with gauges that hit the grip frame
just make sure the dial is not screw down then you just screw it either into your ASA or onto your tank and screw the tank into the gun, and just screw the dial toward the tank and it airs up, then when your done just screw it back out and it de-pressurizes. i still need to test it with prolonged use to see if any orings cut, but so far im just uber impressed, since i was unable to purchase a 420 SV, and im a lover of Duckbills
vid to come