Michael,
I thought, I gave a lot of thought to my install.
My install.
Out standing job!
I wanted a one axes system, just did not have the time. I did come up with a manual North / South tilt, it helps a little, not like yours. Once I built the platform, I had a company that installed Sun Power panels for $5k, included under ground 1 1/2" pipe to electric panel.
I have observed the magnifying effect of the clouds and the sun also. Very cool when it happens.
Had my system this Feb, 2013 for full 3 years. Last month 'Feb' bill was $2.00. I really don't pay for electricity.
With Sun Power you get free monitoring,
here.
Check out, month and year values on link, cool.
Vern