I rotated cotter pins in the rudder pedals 90° and bent over the bolt ends properly. The nuts were tightened and cotter pins were installed properly in the remainder of the rudder pedal bolts. I measured and then cut out one rectangle in the instrument subpanel for the map box. I drilled holes in the corners and then used the Dremel cut-off wheel to connect the dots. Measured for the radio stack cutout in the center of the subpanel.
Cotter pins installed properly in the top of the master brake cylinders on the rudder pedals
String was laid along edge of panel and taped in place
Holes drilled in the corners for the map box cutout