I added about 3 inches of lead (1/2" thick) at 10 and 2 on my racquet, which is a Yonex MP-Tour 5. My groundstokes are WAY more consistent and spot-on; however....It it kind of uncomfortable to serve...Like I am whiffing balls because there is more weight in the head, and somewhat harsh on the shoulder. My question is, I obviously need to put lead under the grip to counter balance it. Which method is the best? And how muchs hould I put?