The tandem doesnt use a solvent. heat and vac. simple as that.
@dabtown dylan built a efficient solventless/ steamless terp extractor, and then it was taken and made into the tandem by the shady owners of Lucid. Theres plenty of upgrades that could be done with it, but its essentially a well built version of the same ultra-quality terp extractor that several of us have been running with cannabis for 6 years at this point.
Theres a very good chance that they were great terpenes, but the thing that most terp makers dont understand is that, especially with extraction of fresh material, theres some ultra-light compounds that need to diffuse out of the terpenes before it cures and ages to its max integrity.
I go through a 2 week slow gas exchange process to allow this process to happen, but a lot of the best terps wont smell that killer right out of the machine, unless the flower was well cured.
Even then, ive found that any cannabis essential oil smells 1000% better (subjective) and truer to the profile after a 4 month cure. 6 months stored at room temp not under nitrogen, the sample starts to sour up, ime