Thanks Brian. Trial and error in finding what works for you can be quite expensive at times. It should be called the "iterative process tax" and not the "newbie tax" because it is a never ending process. It is really nice that people are so generous with their time and insights on this blog. I love hearing about what works for different people.

Hay Brian can you clarify what you mean by "memory effect” of the CdS cells". I just reread everybody's response. Did I miss something?