Close-up photography requires great lighting. Sunlight is great but with a DIY light box you can take great photos anytime of the day...you know for those I can't sleep midnight projects!
Use your packing tape to keep the bottom of the box closed. Now lay the box on its side with the open end facing out & for now leave the cardboard flaps closed to help with stability while cutting.
Once you have cut your three holes out you can remove the cardboard flaps from the open side with your box cutters.
Set up three desk lamps to shine through the tissue paper filters. Use light bulbs that provide natural light rather then regular soft white light bulbs that give off yellow rays.