I've had a fully modded KAB Technics (no arm rewire) for the last 3 years, and have been pleased with its performance. I recently wanted to set up a TT in a second system and purchased a slightly used KAB Technics with the arm rewire. Over the last few weeks I've been able to compare them side-by-side. The rewire does make a significant improvement, and is much more noticeable with a better cartridge. With a Zu DL103R MC cartridge through a Modwright phono pre, the benefits are clear- more lively, better overall dynamics, and greater resolution. With the KAB "Groovemaster" cartridge (a moddified Stanton) the advantages were less clearcut. Perhaps a slight increase in surface noise and reduced warmth with the Cardas rewire. Although the stock wire is more forgiving, with good ancillaries the rewire is a worthwhile upgrade.