Incra's Mitre V120 Mitre Gauge puts repeatability, accuracy with a high degree of resolution within the reach of all woodworkers on a budget.
With each degree indented accurately by laser from -60° to +60° as well as -22.5 °/+22.5°, this is the accurate way to get a very decent mitre gauge without spending next months available tool budget in one go.
Fine tuning is possible with the four screws in the head to ensure it is 90° to the blade and slot, with four adjusting discs in the standard 3/8" x 3/4" mitre bar, providing any required adjustment needed to suit the slot in your table.