Consult 4

The amount of tools per block is defined by a certain premade number. It is better to make this variably by the user. So new tools can be added and old tools can be replaced.

Make a clear list of tools, which tools are the biggest and which one are the smallest.

Are the block different in height? It will be necessary for big tools but not for small tools. There is the option to stack small blocks on bigger blocks.

The block itself could be expensive depending on production. there is a lot of volume that needs to be produced. Try to reduce this or simplify the shape.

Make a system for the blocks. Make is so the blocks are produced via a certain method where you don't need a lot of different machines to produce it.

Make a block that can be assembled by the user. So the complexity of assembly lies with the user and not with the producer.

Don't use conic shape connections it will create tension and the block will be difficult to remove.