I think I see the confusion... People are presuming you are mucking about with butane...
But I believe I understand what you are doing here:
http://www.supercritical-solutions.com/en/supercritical-co2
HOWEVER, I suspect you are not telling us about ALL of the other equipment you need for this operation.
You're playing with the powers of thermodynamics... Is there not some cooling apparatus required to pump the liquid CO2 into the matrix?
At least that weird nozzle with what appeared to be THC concentrates oozing out of it makes more sense now!
EDIT: Just found this site describing how it works in more detail (and they sell small extractors, too)
http://edenlabs.org/supercritical_extraction.html
This is what you are doing, oilmkr, correct?