Laser cutting centering rings - what material

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Gunstar

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I plan to use a laser cutter to cut some centering rings. These would be for rockets with A to D engines. Is there a particular material that would be better to use than others? I'm thinking thin plywood, MDF, hardboard, or something along those lines but they sound a bit on the heavy side.
 
50pt chipboard or 1/8" plywood depending on rocket size and power. If HPR 1/4" or thicker ply may be needed.
 
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