Thread organizer box for skinny spools -- Sulky, Gutermann, Mettler Metrosene (Capacity: 175 spools)

Step 2 Prepare the wooden supports

Cut two lengths of wood trim to fit inside the ArtBin box, along the sides (about 13 and 3/4 inches long).

Pencil a line 3/8 inches from the right-angle edge on the longer flat side of the wooden trim. (I just traced one piece of trim onto the other.)

Mark drill points along that line every 7/8 inches. Begin with the first hole as near as you can fit it near the front edge of the box, so any extra room will be toward the back of the box.

NOTE: In this, my prototype, I originally marked 3/4 inch increments (the straight lines) and then changed to one inch increments (the circles marks) before I started drilling.

I think now that one inch was a bit too much room. Also, 7/8 inch intervals will allow for 14 holes, a convenient even number, whereas mine has only 13.

Use the 3/16 inch drill bit to drill holes partway through the trim. If you're using the same artificial wood trim that I did, as soon as you are through the resistance formed by the compressed surface, you're done drilling.

I drilled by holding the drill bits in my fingers for better control than I'd have with a drill, but that's up to you.