Thanks.
Just in case you want to make a couple, I have listed what I used:
The tubes are Evergreen, #230, 4 1/5" long
The angled pieces are Evergreen, #295
The horizontal and vertical rib pieces are Plastruct rod, #90854. I Super Glued these pieces while slowly turning the tubes and wrapping the pieces around. Then I cut the vertical pieces to fit and glued them in place. I was originally going to use small half-round pieces. These actually might work better because you will have more of a surface to glue.
The tubes on the back for the straps are Evergreen, #223. I also glued a tiny piece of styrene to this tube to help make it stand out a little more.
For the latch, I used Evergreen, #226. I cut a small piece off, then I cut this piece in half. Then I glued two pieces of styrene to the two ends of one of the half pieces I just cut so it basically looks like a long horse shoe. I then just cut and used pieces of styrene to complete the looks of a latch.
For the lid, I set the completed tubes down on a piece of styrene and drew around it. Then I cut this out and glued this to the top. Make sure you glue this to the correct end. The top lid should stick out slightly.
Hope this helps.