i have been using my Cobra Sz440 for a few months now with varying degrees of success. I usually get good distance but tend to spay it about a bit, and my bad shot is a high weak slice which i could throw the ball farther than!! I have always felt that the club head was too light and i had no feel for where the head was during the swing and through impact. I mentioned this to a playing friend of mine and he suggested using lead tape to increase the weight. I tried this about 2 hours ago on the driving range and the results were fantastic! I applied 2 strips of tape to the heel and 1 to the toe and the feel of the extra weight made hitting it so much easier, i hit about 60 balls, all felt solid and straight. Even the off centre hits went great. I realise this weight must not suit everyone but i would suggest anyone give it a go if your having problems, what have you got to lose!!