Has anybody installed the Qualite Pistol steel grip frame to their Ruger Blackhawk revolver? These are offered directly through Qualite Pistol or from Brownells's. I'm wondering what is involved in "fitting" these frames to the gun. Qualite pistol offers custom fitting for $100.00, which leads me to believe that there is more involved than a few short passes with a file. I am not a gunsmith, but feel that I could handle the job depending upon the amount of cutting that is required.