Step 3: Cut the wood parts
Cut a second piece of 1/4 plywood matching the first for a easy add on later.
Cut a piece of scrap wood into a 2 5/16 inch long, 3/4 inch tall, 1/2 inch thick GP2D12 mount.
The scrap servo / IR mount could be made by laminating 2 pieces of the 1/4 inch birch plywood together.
When everything is cut out give it a gentle sanding to clean up any rough or fuzzy edges.