Here is a standard fusor grid about the size of an apple. 
Tetrahedron.vertices.each_with_index do |v,index|
`#{mged} ‘in torus#{index} tor 0 0 0 #{v.mged} #{40 } #{1}’` #the torus solid
end
`#{mged} ‘r chassis u #{(0..3).map{|index| “torus#{index}”}.join(” u “)} ‘` #combine the pieces
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[...] I sent in the STL of the grid shown previously to Prometal for a quote. Unfortunately it can’t be made as designed: We feel that you could [...]