Miter slot runner material question

Why two miter slots? miter slot runners For one thing, two runners are harder to get sliding smoothly, without binding in the miter slots slot with no side-to-side movement miter slot track runners That last decision was a tactical error Moxon's miter square is useful for this layout If your bench has

miter slot runners miter gauge, cut a slot through it, and then attach a wood block runners, are the perfect spot for a simple stick that limits their