This document is an email chain between Thane Heins, president of Potential +/- Difference Inc., and Dave Pascoe of Magna International regarding a bi-toroid transformer technology. Thane provides test data showing the technology achieves significantly higher efficiencies than conventional transformers. Dave requests a demonstration showing the technology can power itself without external energy input. Thane agrees to connect a motor and generator to the device to show excess energy production. Dave remains skeptical and wants his electronics expert Jim Kane to evaluate the technology.