Very strange situation.... I'm a high end 4.5 male senior player, still hitting the ball hard, played college tennis, former top 25 national senior ranking, etc. I've been playing the Pacific X-Feel Pro 95 for about 2.5 years. Groundstrokes are probably better than they have ever been... I absolutely swing as hard as a can and crush the ball. Volleys are steady and get the job done. Problem is I can no longer serve with the frame. Most of what I play now in tournaments or league tennis is doubles, and for the last year my serve has gotten more and more shaky with the Pacific frame. I really struggle to get in a second serve trying to come in behind it, have no confidence, and find myself double faulting under pressure. I've become somewhat of a basket case, try to avoid serving as much as possible, etc, while absolutely crushing groundstrokes with the frame. I'm using 4 inches of lead tape at 9 and 3, 4 stripes. It is a racket issue... I can take out other frames and not have a problem. Played yesterday with a Prince Classic 100 Graphite and no problem with the serve. The Pacific seems to have too much pop / too high a launch angle for my motion. I've tried everything, higher toss, lower toss, more spin, less spin, get rid of the old standard loop in my service motion, you name it. I've decided I have to change rackets so I can avoid being a double faulting machine, but I hate to give up the great groundies I have with the Pacific 95. Anyone else ever run into this issue? It is very frustrating! The wrist and elbow are very touchy, so I can't play with most of the stiff frames on the market today.