J
juicepuddle
I don't think you can work around the issue of terpene degradation due to heat based on my limited knowledge. That is, heat degrades terpenes period. Heat, the great destroyer....
Of course maybe the wiser folks can jump in and give a more thorough answer.
The problem we face is terpenes boil off at a much lower temperature then the butane, even in the softest purge to get it somewhat clean your losing many terps.