I'm playing with my k-90's, and I love 'em. That said, I just had a chance to trade one of my 4 k-90's for 3 rok's, and i took it. I have been intrigued but this frame, and I just wanted to give them a try. they are being sent out to me today. anyone done a comparison between the k-90 and the rok? or anyone own both? I've read that the rok is flexy and low powered, plus it has a different tighter string pattern. the weight is also a factor. im just wondering what to expect. thanks!