I am in the process of moving some of my nicest raw coins into intercept shield 2x2s. I have heard they sell boxes for their 2x2s, and it looks like they have 2 rows in them that each hold 50 2x2s. My question is...are there little notches in the walls that hold the 2x2s in place or are they just stacked in there. The reason I ask is, I don't have 50 coins moved over just yet...and I want to store them such that they don't fall all over the inside of their box. Has anyone used these boxes before?