If it were me, I'd do it myself since nothing has to be 'fitted'. I do all of my own gunsmithing on my pistols. Most of them being Glock helps a lot, but even on my SIG. Along with the armorer DVD's and such, the internet has vast resources for the DIYer, and I beleive in funds retention. I did plenty of work on my former 1911 models, one Colt, and one Norinco, and know this is relatively easy with the proper tools. Here's a start for you barring any strange differences between your Kimber and the basic 1911.