SO my lovely father built me a shelf that I "designed" (I don't know that you can really design a bookshelf) so I will just give myself credit for coming up with the right measurements for the shelves. I wanted it to be for my current cartridges but big enough that if and when I get more cartridges it would hold them all. So I got him to build it a big bigger then needed but I figured I could use it to hold some current projects etc. I think he just did the best job! I love it and it's actually really nice to have a place to put my cards, I usually just put them in a bucket!
Anyway thanks dad you did a great job and I find the whole thing very inspirational, I love looking over there mid day as I do my work! :)