Festool Domino Machine Instruction Manual - page 13

The first is a two part fence extender.  

One part attaches to each side of the 

Domino fence and each features a mov-

able spring loaded reference pin and nu-

meric scale.  They attach by a clever 

dovetail machined into each side of the 

Domino base as shown in the photo be-

low taken from the bottom of the base.  

In the photo above the inside edge of 

the spring loaded pin is set to be 150mm 

away from the horizontal center of the 

mortise slot.  The red arrows show the 

alignment scale and pointer.

In the close-up below the pin is set so it 

would register the work piece to position 

the mortise slot 105mm away from the 

edge of the work piece that rests against 

the stop pin.