[EdZ]

I understand the idea behind the Aim point. I had always done this with my wedges, but didn't know how to verbalize to others how I did it. So, now I am trying to integrate this point thru the rest of the bag. My question is..how far is too far forward? I get pretty good results while using my irons if I drive my hands at a point a good 12-15 feet in front of the ball. The only visual I have seen of the aim point is in Bobby Clampett's book Impact Zone and he shows it being about 4-5 inches in front of the ball. Am I overdoing it?

Depends on the perspective you are taking IMO.

Clampett's 'view' is about where the thrust of the hands is aimed at startdown. The 12-15 feet you mention, is likely your 'view' of where the hands are at impact, impact hand location. Same idea, different ways of seeing it. Down plane thrust.