Step 1: Materials and tools
Coat hanger
Copper or steel wire..
TOOLS
Tinsnips
Pliers
Wirecutters
a marker
Power Drill with 1/8th bit

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Just a thought: you could also make one or two (concentric) circles - or maybe better squares or stars - out of the coat hanger and wire that to the two base rods. That way you need only four holes for the grid.
i think i will do it that way when i make a new one.