Tried to surface my spoil board yesterday. I get a slight ridge running the router along the X-axis. What is the best way to correct this?
your router isn’t square to your rails.
First level your rails, then your router.
Have a look here. Helped me a lot!
Furthermore you can adjust your router with the slop of the holes where the x axis is mounted to the y axis (loose the bolts a bit and a 90° angle bracket).