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What type of material would be best to build a sub box?? - sub box demensions for sport trac

I have two Orion 10,2 's and would like a custom field for them. I thought, made of fiberglass or wood, but I do not know what the best ....... Also what should Demension for the table and must be worn. If someone is a diagram should be the size of the box and equipment, please send me the link or tell me