Next we check fit by suitable arrangements.

Increase size of working area, group each set of parts together, then drag around to check:

Next, modify/add geometry and arrange for cutting out of some reasonable size of stock which will fit on a machine. The largest part is 3" x 8" so we will try 4" wide boards which are a bit longer than 16" long (which will allow this to comfortably fit on any Shapeoko (my apologies to the Nomad folks).

Before we get too far, letâ€™s mark the lid with a finger cutout:

Then we select everything and rotate it 90 degrees:

Weâ€™re going to need two boards, so letâ€™s draw those in:

(note that youâ€™ll need to use boards a bit longer than 16" at least for the sides/top, the bottom board can be ~12" long)

Next we arrange the parts within those two rectangles leaving room for an endmill to get into things:

and expand/modify geometry as necessary to allow cutting things out and to use a 1/8" endmill (the grooves for the top/bottom will be slightly increased in size to allow it to fit)