It sounds like you may need a little more drop. Another option that will accomplish the same thing as lowering the stock is to raise the rib. And, unlike cutting on the stock, it can be undone. You can experiment with different thickness balsa wood strips available at hobby shops - 1/8, 3/16, 1/4, etc. Just spray paint it black and attach it to the top of your rib with couble sided tape. When you find the correct thickness you can get an add-on rib, such as an easy-hit, and install it.