I replaced the artificial ruby ball bearings in my Elecom Huge with Stainless Steel ones. So far so good! I have ceramic ones on the way that I can't wait to try
Red Ruby Balls – Redhill Precision Specialty Balls
Amazon.com: ELECOM Ergonomic Comfort Design Trackball IST Wired USB-A Connection, Smooth Tracking with Ruby Ball Bearing, 36mm Ball, Thumb Control, Compatible for Windows, PC, and Mac White (M-IT10URWH) : Electronics