Very nice results! I must do some LN2 tests next week. Here is some results from "H20" cooling:

http://hwbot.org/submission/2317777_...0d_19237_marks
http://hwbot.org/submission/2317778_...0d_11479_marks
http://hwbot.org/submission/2317779_...60d_7920_marks
http://hwbot.org/submission/2317775_...60d_2100_marks