Simple construction of a 2 story Savonius wind turbine

Описание: This Savonius started as a single story but then a realized that a second story on a 90 degrees angle would add more torque and less cogging. It also became easier to start at low wind speed.
This was my first experiment and it wobbles too much due to lack of balance and one disc not well centered. I glued a threaded alternator belt on the rim of the lowest base and adapted a pulley, for that same thread, to an Ametek.
Supposedly I should have a ratio of 1:10 from the base disc of the Savonius and the pulley on the Ametek. With an average of 200RPM I got on the Savonius I would have ~2000RPM on the Ametek. The problem was that with so much wobbling on the Savonius, the base kept kicking the pulley out of alignment. I did milled the base, in place, to make is a perfect circumference but, still the result was not what I expected in terms of output power. The reason for that is because I live inland in Florida and the wind here averages 7MPH at the height the Savonius was installed. I cannot have it higher due to HOA rules. They also do not allow for us to have solar panels on the roof which is a shame as we have 4 solar panels 165W 24V on our back yard.