A single manufacturer in a bubble, all 5 belts are connected through floor holes at the bottom. Every vertex (corner) of the shell has a wall power connector inside, so it's easy to connect to your grid anywhere.

Some measurements:

• edges are 10m long (diagonals are 9,5m to fit the grid better)
• total width (center of pillar to center of pillar) is 30m
• total height (center of pillar to center of pillar) is 28m
• each "layer" of vertexes (corners) is 7m up

A cool property of the truncated Octahedron is that they can be packed together with no gaps. To do this, move the next one 20m sideways and 14m vertically. To place them without overlapping pillars and with a good-looking gap in between, I recommend 30 sideways and 21 vertically