Or having a variety of colors to choose from might be a nice option.
Also, if you made the set just like the one that comes with the KMAC 2, you could have:
2 - 1.5x blocks
2 - 1x blocks
2 - 1.25x blocks
This would allow anyone to pick them up as they saw fit, for whatever keyboard they wanted to use them on (I think the presence of a plate is required to hold the blocks in place properly, and to not make contact with the PCB).