I apologize for late reply because of my busy working.
This is my collection in 2013, you can see the fist post this thread.
you will see the space front of each shelf but if you see my recent collection like this pictures.
So you will see the space is disappear so it means that I have double row every shelf.
each row has 17 so 17x2x6x3 = 612 for 3 cabinets. Congratulations for NeoGeoFanatic because your answer is nearly. Please send your address to me at PM. I can send next week
Thank for some join game. If anybody feel doubt your AES, I can help for checking my cart to compare with you but I am not good as member here to open cart for checking internal. I can check insert, manual, cart sticker external as possible I could. I am happy to helping and not charge any fee.