Interesting, makes me question the design of TM especially since they just released news of their wood m870, which is a heretic act within itself. Then again they'll justify issues since we're now using duster which just int powerful enough.
I am a little lost why this "air pocket" is essential, i figure a vacuum space with the needed gas is preferred, not to mention allowing more shots. Is it safe to say it'll always leak with GG or propane? What about the PRO ARMS/SAT valve??