I'm thinking about switching to the Wilson KBlade 93 from a Wilson ProStaff ROK. From what my coach has been telling me, the KBlade is just a ROK with a bit more of an open pattern stringjob. Has anyone made this transition into the KBlade from a ROK and can share with me any difficulties they've had? If it makes any difference, my first racquet was a Dunlop M-Fil 200 demo version, (yellow grommets instead of silver?) Anyways, any help would be appreciated, thanks!