Like Bama said go trusted domestic. These guys can't even get their engineers to make lipos right, how would you expect them to get harder to make oils right without SS... tou are dealing with salesmen not brewers... order oils at your own risk and test the fuck outta your gear!another two of these new post-tracygate identikit sources has told me ONLY DHB has guaiacol, so probably that means DHB definitely does as well as a bunch of others and maybe 5% EO in everything.
I agree, whatever someone is comfortable doing, but at least be transparent to your customers so they can make decisions without random evasive guesswork.