The special feature of spacer fabrics is the material thickness the third dimension of this textile

Can you repeat this sentence, but add in punctuation?
The special feature of spacer fabrics is the material thickness, the third dimension of this textile.
But what the modelers do not say is that the number one eighthundredpoundgorilla assumption is that the model is valid

Can you repeat this sentence, but add in punctuation?
But what the modelers do not say is that the number one, eight-hundred-pound-gorilla assumption is that the model is valid.
Work a 1cmlong buttonhole into the folded edge and cut open

Can you repeat this sentence, but add in punctuation?
Work a 1cm-long buttonhole into the folded edge and cut open.