I believe I've seen jason floating around XS before...and I generally go over there to see whats up in the 'Uber experienced' crowd.......I figure if you're using dry ice now it's only natural that LN2 be the next step.....You see the news about chilly1 being able to test a new mixture of gasses and within his triple cascade phase change was getting like -210C temps......freakin ridiculous....the gas mixture is on NDA however because it's not his personal mixture, it's some other companies....interesting stuff.