Curiously Strong and Wireless Usb Mouse

Step 5 Measurements

I traced the tin to get a basic on where I am putting the board. The optics measure 1cmc3cm with 2 little notches. I offset it 1.5cm over and 2 cm up from the bottom left corner of the tin (easier to see in the picture). Then I cut out my trace and the hole to be cut and affixed it temporarily to the bottom so I could mark the bottom with a sharpie to cut.