Looking at your pictures, and from my own drawer build for my wineador, I will make a suggestion. If you are planning on using wood as thick as you have for your mock up, it really isn't necessary. If I were to do mine again, I would go no thicker than 1/4" for the bottoms and 1/2" or less for the sides/fronts. I would also go 3" tall sides instead of 2" like I did...I'd fit alot more sticks in mine if I had gone that route.

Looks like a good solid and usable design though.