A longer link can cause more problems than it solves. The barrel/link combo has to fit the frame as well as the slide, and the longer link can do bad things to both. The American Rifleman did a step-by-step accurizing of a 1911, in an effort to determin how much of the total accuracy improvement was attributable to each step. They tightened slide-to-frame fit, installed a match bushing, welded-up and recut the barrel lugs (this was maybe thirty years ago, before the plethora of "match" barrels available today), etc. The simple step of installing only a long link did little or nothing to improve accuracy.