I'm a bit late on this.....
I'm curious why, since you have your choice of connectors to use, you decided on something expensive and difficult to obtain.
As an example of an alternative are Elecrow's "Crowtail" ecosystem of connectors and products. Connectors and cables are extraordinarily inexpensive, as this picture shows. I've settled on the 4-pin variety where I may want to interface different boards together using I2C, UART or general purpose I/O. You can also get jumpers to Dupont pins for connecting to a bread board.

Elecrow has an entire ecosystem of modules using this system, from simple switches and LEDs to complex sensors and functional modules.
These connectors are the same pitch as Seeed Studios Grove system although I'm not sure they are compatible. Like Elecrow, Seeed has many different building blocks that can easily be used together.