yeah, I chickened out on taking my steelcaps to a 55gal HDPE drum with tincture at -50…(interwebs suggest I could have gotten away with that…)
I also wasn’t able to achieve -70C on my tincture that day…cheaped out on dryice.
given the null hypothesis that it would drop >$20k worth of cannabinoids on the floor, I decided to try something with less financial risk 
I’ll get back with data when I have it.