Yea, the Pro sized Kimbers with the four inch barrels don't use bushings. I had a CDP Pro for a while. It was nice, reliable and reasonably accurate. But, like numerous other guns I've traded or sold, I wish I had it back. The last Colt I had was a Series 80. The internal safety on them affects their trigger pull somewhat. It can be worked on to a point to smooth it out. But, even then I still preferred my Eclipse's trigger pull. There is a shim you can put in place of one of the parts in the frame and then you can remove the part in the slide and eliminate the problems inherent with the safety. I've heard of several folks who have done that. But, I don't recommend it. I don't like messing with any safety's on a firearm.
I agree the full length guide rod is a solution to a nonexistant problem. I've been thinking of replacing mine, if for nothing other than the ease of take down and cleaning. I like to take mine hunting with me sometimes and if I had to clean it at camp or in the field for some reason the guide rod makes it a pain in the hiney.