Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4056897.

The Terraforming Committee now sits in comfortable 3d chairs instead of sliding around on the board with every bump.

I included the OpenSCAD file so you can adjust the offsets if the factions sit too loose or tight in the platform

I added two variants of the platform to also restrain the delegate reserves, as suggested by dan1033