How parallel should TS blade be to miter slot?

Things tagged with Miter slot miter slot Cutting he miter slots with a skillsaw A router works better ,but I wanted to see if I could cut them miter slot track I remixed the Miter Bar from the Table Saw 45 Degree Miter Sled thing to make the bar longer and to better fit the slot in my Saw Stop table saw

miter slot I used my plunge router and a shop-made jig to rout miter gauge slots into the top of my