[Midnight Rider]

Thanks for the input so far. I am probably over concerned about hand position....but I want to develop the best form I can starting out. I asked an instructor tonight....and he said when you get good you don't even need your thumb!

I have just seen some very competent players that appear to keep their wrist lower than the neck with their fingers curled around onto the fretboard, with very little thumb contact.....and it looks like "textbook" form to me.