I play with the kblade 98 as well and I added 3 grams of lead at 10 and at 2 then added a wilson leather grip to each of the racquets. I wasn't able to weigh then before my setup but now one is 11.75 ounces and the other 12.1. For the most part they play the same but I thought I could feel the difference in weight. If I continue to add weight to the lighter one do you think it will significantly alter the feel of the racquet? If anyone has any ideas about potential problems or if your kblades weights are largely different what you did?