You can pretty much glass in what ever you'd like... I personally wouldn't add wood because of the added weight.
One way to add strength is glass in balsa wood or use cardboard. Once you glass over either of these products it's super strong & doesn't add all the added weight plywood or OSB adds.
Yes fiberine & CCV add wood but they are the only ones & the tops are extremely heavy. Everyone else uses balsa or card board. Which is how all tops are supported in The EU & Canada
I been working directly with someone in Canada and really like doing supports with cardboard & glassing over. Just my 2cents
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