does anyone think that the k-blade 93 is unstable? and can someone compare it with the k6.1 18x20? is it more or less forgiving? ive hit with the kblade 93, but not the k6.1 18x20. i like the kblade, i just think its unstable, and only forgiving if i work for every stroke. if it helps, im an all around player at about 3.5-4.0. my old racket is the ntour.