I knocked this little jig out for calibrating the miter slot/blade and right miter slot/fence. It is also useful on BT's for setting the MST to the blade, and rip fence if you have a MST on both sides of the blade.(set right side MST to blade, then fence to MST) The indicator is the HF ~$10 one, with a tab on the back with a 1/4" hole in it. I routed a 1/4" slot on one end of the oak scrap and drilled a 1/4" hole through the sides to match the hole in the indicator tab, drilled 2 1/4" holes for mounting to the miter fence near the other end.
It's tilted down on the left cause if it's level it lines up with the slot in the rip fence on my Ridgid 3650. Bad planning on my part. [img]redface.gif[/img]
Hope this gives you an idea for improving it for your application.