left wrist at address

Hey Tom,

I had a question that im not sure if there is a direct answer to but it involves the left wrist at address. I have a real tendency to suck the club inside on the backswing and I always have a flat left wrist at address. my bad shots are always towards the heel which drives me nuts. I have been playing around with cupping my left wrist at address (makes me feel like Fred couples, but not that dramatic). but it seems to make me bring the club back more vertical. I guess my question is does this make a difference or is this a placebo effect?

thanks,

Justin