Step 5: Secure Edge Padding
First secure the bubble tape edge roll to the cardboard edge using some nails. The nails will poke holes for the fasteners as well as keep everything lined up and in place. We used three nails for the padding. Then 'sewing' with some wire, we fastened the padding to the cardboard. Make sure that the twisted connections are on the outside, so not to scratch up your laptop with sharp edges.
Repeat these steps for each of the 3 edges.