For the pyramid rack, in addition to full-sized cubes, you will need modules of less depth. To create the effect of the pyramid, each next row, starting from the second, should be the previous one by 25-50 mm. With independent manufacture of modules, it is not difficult to withstand this requirement. But if you use ready -made cubes, some of them will have to be «shortened». The easiest way is to make this a stationary or manual disc saw. The main thing is that there are no nails, screws and other fasteners on the cutting line. An even greater expressiveness of this design can be given by painting the rows of cubes in various dark or light colors.
For ease of storage of variables in the size and nature of things, there are many possibilities of additional equipping typical modules. In Fig. 2 shows several simple options that can be realized even in a very modestly equipped home workshop.
Shelves. You can make them from multi-layer plywood 10-12 mm thick. It is better if they are light -removable and rearranged in height. To install the shelves in the side walls of the module (on their inner side), you need to drill two rows of deaf holes with a diameter of 6 or 8 mm with a step of 30-50 mm vertically. Having inserted into these holes the dowels of the corresponding size, lay the shelves on them. Mark and drill holes on both walls under the grafting of a webacling holders very accurately and accurately, otherwise the shelves will turn out with shaky or skewed.