Cut all interior details first.
pins holes should be helix cut to 1/2" deep
sholder on the mounting holes is designed to be cut to 1/2" deep
then cut the perimeter.
note: this is designed assuming double sided tape will be used to secure stock in place.
also, the shelf position may move a small amount when loosened and repositioned, consistent indexing against delrin pins should only be expected if shelf is not repositioned.