This past fall I went to my driving range and wanted to find which instructor there would give me a quick lesson, and also film my swing. He wasn't there, yet the elderly gentleman in the pro shop asked me why, and other questions. Then he grabbed a 6 iron from a bag of loose irons, told me to buy a bucket of balls and meet him at a stall. After watching my swing, he told me "strong left grip( as for holding, not position) and keep wrist flat". What a difference this made, saved me the $100 or whatever on the lesson. He wouldn't even take a tip. I also saw this on some Golf Revoltuion vids and see this now when they show SloMo swings of pros during a tournement. It makes sense, as for the compressing of the ball. Also, holding the club a bit tighter with my left hand, prevents the club from opening or closing for me. I did forget to ask him about the driver. Could, or should, I keep the wrist flat for my driver also, even though I am not hitting down on the ball, rather hitting up?