Before placing more lead, go an get a spinner weight from the LHS. This is a one or two ounce weight that fits on the front of the prop like a spinner. This is the farthest forward you can place such a weight, and the farther forward you can get it, the less you will have to use. As a matter of fact. I have one that I will never use. Give me your address and I will send it to you, gratis.