Flip Flap flower circuit revealled but unclear

Yes, thanks for the videos. I have the model with the spherical housing, with the two leaves linked in opposition so that they have to move equally. The front leaf has a permanent magnet and a pendulum weight, the rear leaf just a weight. The magnet is close to the horizontal coil at the base. The flower head has two weights and a small steel screw which appears to be the sole magnetic path into this component. This screw is fairly close to the front leaf magnet.
It's my belief that there is only one permanent magnet in the assembly.
As for the driving circuit, AAC's vol. 3, Thyristor article starts with the Shockley diode. If you could make two transistors with suitable collector-base leakage, surely they would become a Shockley diode with a breakdown voltage as low as, say, 1200mV? Then the pulsing circuit really does need only two terminals.