I can confirm the Final Labs Parthenon was reviewed by TAS, first by Harry Pearson and then by Warwick Mickell who was a TAS writer based in Japan. I own the unit reviewed by Warwick, a personal friend. Unfortunately HP insisted on putting a high mass turnable onto an unstable air platform, against the designers advice and although HP liked the tt he commented on the bloated upper base. It is still more advanced than most heavy mass tt's built today and the Micros & Melcos. The motor controller includes reconstructed power supply sine and cosine waves, to provide stability for the motor controller/motor, the ability to adjust the torque applied to the thread drive and precise independent 10 turn potentiometers to dial in 33 & 45.
In my experience both the high mass turntables and the top direct drives, the L07D and Technics SP10mk3, got poor reviews due primarily to poor set up and incompatibilities with tonearms of the day. Many of the tonearms in those days had resonances and required careful matching to the tt and armboards of the day.