Peel and stick. How much weight they add depends on what size wrap you get, but generally they are between 4 and 9 grains. Will they take away from your FOC? Yes, but we're talking about 9 or 10 grains at the most here, negligable at best. We MIGHT be talking about a tenth of a percent or two, don't worry about it. In my experience, you need to change things by 25 grains or more to make any noticeable difference.

Clean the shaft with warm, soapy water, and hit it w/ denatured alcohol, they'll stick great. Oh, and use a mouse pad to roll the wrap onto the shaft.....Using a hard surface will guarantee wrinkles....