Did you think to put your Chrononauts cards in Yu-Gi-Oh! card sleeves? And then what? Where do you put them now? The original box will not be able to hold them anymore so this are two boxes to carry this game around, while the cards are well protected inside those sleeves. Just print this PDF and cut along the edges and use double sided tape (I worked this to be the best method but YMMV) to put them all together.