I have been using various Totem items to build control frames for model railway electronics. I use a mixture of Arduinos and other items which need to be connected to each other and to computers for programming. They also need power. Some of these need to be grouped together to operate a control panel.
I have a Totem Minilab as one of my racks for experimenting. I also have one of the Grove frames which I have adapted to hold more of the modules I want to mount.
I bought two sets of the side frames for the Minilab which I am using to build a wider frame - 10 cm instead of 5 cm. I also have spare fixtures to build more of the Grove type frames. Those can be 20 cm wide or wider if needed. I will link these together to make a panel.