i recently started hitting with an old hps6.5 18x20 and really love the control, i always thought i would hate an 18 main frame. i would now like to try a hps6.1 18x20 or any type of 6.1 18x20 to try and get a bit more power but keep the control. i noticed that the hps6.5 has six holes at the throat and the 18x20 6.1's all seem to have eight holes at the throat. i am wondering if anyone thinks that it makes any difference in the feel of the racquet? and if anyone has tried the hps6.5 and then went to a stiffer version of the frame?