I wanted to have my admin buttons light up but wasn't sure exactly how. 
First I tried a half circle but was really not happy with the look.

Then I tried a full circle.  I really liked this look but had a lot of trouble getting 4 of them in a row to line up perfectly.  Between the laminate and the plexi things would get just off enough to bug me.  Again this is where a CNC would simplify things.  

Finally I settled on trying to mimic this shape from the original Discs of Tron CP.

To make the shape I had to route a 1/2 circle that was slightly larger than the button hole.  Then I had to route a 1/4 circle that is slightly larger than the 1/2 circle.  
To line all the circles up properly I drilled my circle patterns at the center of intersecting lines.  

Then I could line up the patterns using the intersecting lines.  Here I added another board so that when I routed I ended up with a half-circle. 

Then I added a larger circle and a board with a 90 degree cutout that left me with a 1/4 circle.

Which left me with this pattern.

Here it is unlit.

And lit.

Here is the completed laminate.  Time to start putting everything together.
