Unless the Raybestos kit requires changing the factory control arm mounts on the CAR, there's no way to get more adjustment other than the offset bushings, or different control arms. The factory cams or replacement cams already adjust the control arms to the maximum amount that the factory adjustment slots allow. So, unless you enlarge the slots the cam bolts go through and the brackets the cams adjust against, you'll get no more adjustment than the stock cams allow. In reality, the offset bushings allow for no more adjustment, they simply change WHERE the adjustment is made. By installing the bushings with the offset in a specific location, you simply taylor the adjustment range more specifically to suit what you are doing with the car.
Would you recommend solid tie rod adjusting sleeves? (is it worth the cost) I'm looking for you autocross / road race guys to chime in. I will post pics of my install in the spring, I'm just ordering stuff for now.