What's the texture of the surface? Handscraped wouldn't show cupping as much, kinda blend in.
Glueing over plywood I wouldn't want, try removing that down the road.
We didn't install this product, we were on another job, we ripped up tile on it and moisture was too high in slab so they went to this product.
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No glue is going to stop wood from moving if it wants to move. I spend my time learning my clients heating & cooling habits before recommending what wood to use. Hickory is unstable if you've got high swings in moisture, but if your client doesn't keep the windows open in the spring & fall & keeps the interior of the house at a relatively constant humidity, it'll remain flat once it finds it's moisture balance. I install aquabarB under all my floors to help keep moisture changes from moisture differences in the subfloor. Different woods absorb & release moisture at different rates.
If I've got a client that likes the great outdoors spring & fall, I don't recommend 5" hickory or brazillion cherry. Both are going to move a lot with humidity swings. I've installed quite a few 5" hickory floors & have never glued a single one of them & have never had a callback because of cupping. I credit that to only putting it in homes with constant humidity practices.