I am 67 with a bad heart so I have lost much of my strength. I put a 20# recoil spring in my 1911 copy and found that I could nor rack the slide more than halfway. Many ideas, drawings, went to Wal-Mart for parts and material to make my own device so I could rack any slide with ease. I found that somebody had made a clamp for carpenters,I think, called "Quick-Grip handi-clamp" and when I saw one I knew this would be exactly what I was looking for. Bought two, $4.95 each, went home and held the pistol grip with my laft hand and held the clamp with my right and snuk up behind the 1911 slide and grabbed it where the grooves are at the rear of the slide. The clamp has a cam locking device so I just squeezed tight and then pulled back with the clamp and racked the slide five or six times with ease. Then I pressed the release lever between the handles and the clamp released. I had planned to design and make a device but this clamp works better than any idea that I had. I have ordered the smaller models, this is a 200, for my smaller pistols. I can now rack any slides with ease.