David:
Great information…. it makes me realize just how much I do not know. But, I appreciate that I have a machine which I can grow into as I do learn things. Sometimes I feel overwhelmed – especially when I try to do something and mess it up totally. However, as an instructor I do understand that only through repeatedly making mistakes does one eventually fall upon a good way to do a thing. It is through this process that true learning takes place. Thus… I am constantly learning. 
I count myself as truly fortunate to have such mentorship as I find here.
Thanks so much!!!
Tom