Razorblades- I believe you're getting way too defensive for no reason. I am not, and never did in this thread, compare the 7 Iron to your tunnel deck, nor have a criticized your deck. Just the opposite if you re-read my last post to you. This thread is about the MF Z's and they have the same approx. BTS as my CUT's deck (very close), and very close to the same depth of deck and tunnel. I know what mine will do, and pretty much exactly what to expect then from the MF deck. That's my comparison in this thread. Another thing is that if the tunnel decks (of any make) were the best way to go, you can bet your last buck that every major manu would be switching over to them. There's a reason they're that deep deck over the entire cutting area of the deck.