I bought an INCRA Miter Gauge 1000SE from Woodcraft before my 520 was even out of the box. Who'd have thought that they woould not have the standard sized slots. I had decided to sand or machine the bar, too, but I saw the INCRA Miter Express in a recent catalog. Even though it costs as much as the gauge, it does allow standard gauges to work in a SS. I haven't gone either way, yet.
2004 520 w/bandsaw, jointer, belt sander, DC 3300, Universal Lathe Tool Rest, Talon chuck, & Lathe Duplicator