Have you have ever had to remove 10 thou from a PCB or a bezel.
Maybe you needed to to add a taper to a bottom cover of a chassis.
Sometimes you need to square up a surface.
These tasks can be done by sanding, however success varies.
Adding
Pin Routing capability to a drill press can make these tasks fast simple and gives professional results.
There are two parts to a drill press pin router.
The
pin plate is attached to the drill press arm such that the router bit is centered on the pin.
A sled holds your work and slides on the pin plate.
Your work is attached to the sled with double sided tape.
The amount to be removed from the work hangs over the sled's business edge.
Moving the sled and work to the right allows the router bit to cut off any overhang.

Kitchen HDPE cutting boards are great for the sliding surfaces.

Washer #1 and #2 lock the adjustable sled surface in place after the sled has been advanced to the routing bit.

Hand holds are 6-32 nylon standoff's.

It is very important the blue edge be 'jointed' since it determines the path that the sled follows.
If there is a small imperfection in this edge this imperfection will be transferred to the work's edge.