Okay, I updated the box to the 8" x 8" x 12.75" dimensions--or it should be close depending upon joinery method.
I gave the lid a 1/4" overhang all the way around. BTW, everything is 1/2" stock but I see that maybe we need to go with 3/4"? Actually, the top is 3/4" but the box/drawer/drawer front...all 1/2".
I hadn't noticed the ability to upload a LARGE zipped up file so I have included the .SKP file as a zipped up file: box1.zip (box1.skp).
Cool!