Step 3: Add the padded pouch
Trace the rectangles you made onto the inside of the pouch. I moved my front rectangle over a little to center it better.
The last photo in this step shows a mistake I made. I thought my pouch was too big, so I cut a bit off the side. It turned out I needed that bit to compensate for the extra width needed when the lens was extended, so I had to make up for it in the next steps.