Sigh.... where to begin. Bought our dream house which needed a complete gutting and rehab. Its a tri-level, so the main floor is slab. First the slab had settled in the past and in order to try and get it flat i had gypsum concrete pumped in. Having never done floors before, i did not know how important it was to make sure the concrete was completely dry. I put in about 900sq feet of click strand bamboo from LL, and after 4 months most of the boards are cupping, i have 4 spots where the floor has completely come apart, and all along the walls the floors have shrunk past my baseboard quarter round. So... i messed up pretty bad. I have also found that i hate the floating floor feel, and we dont like slippery and smooth these floor are. So eventually i would like to replace it all. To make matters even worse, my wife ordered the cabinets and the whole time i was under the impression they were standard base cabinets. When they came they had furniture feet so not knowing what else to do i ran the floor under the cabinets....

At any rate, i was hoping for some advice on how to redo these floors. Would i be okay screwing down plywood then installing nail down floors? I had one contractor out and he said engineering floating is the way to go, but i really dont know.... Wish i would have done better research in the first place

First off I have dealt with a consumer who had the same issue you had with the cupping and shrinking. LL had their preferred installer do it. They did not unwrap and let it dry down, but then thats also a problem because it can warp the planks if it gets to dry.
If you used a vapor retarder/underlayment it may not be the slabs moisture, it could be they dried down and uncoupled like these peoples did. No one told them to get a humidifier. So they, LL threw they're contractor under the bus so to speak. Heating a home drys out the air and the stuff shrinks. If its shrinking that means it's most likely not moisture from the slab, the bamboo is simply shrinking because it is so dry in winter. You more than likely are experiencing dry cupping.
You complicated matters with the cabinet feet. Thats not allowed with that product and neither is it for any floating floor. You need a toe kick on the cabinets in front of the feet.
Cut out the floor along the cabinets and install another floor. Sell your bamboo on craigslist to recoup some money.
Now make sure your contractor has the proper moisture meters and thermohygrometer to check the ambient temp and rh in the house and proceed when it's ready to install. Remember acclimation is key.

Thanks for the reply. Yes, i used the bellawood premium underlayment which is supposed to be a vapor barrier. I also had most all of the wood in the house acclimating for about 3 weeks before it was installed. (all boxes were opened and plastic opened as well). I already bought a toe kick saw to cut out around the cabinets, and i have figured out a relatively simple way to put toe kicks on the cabinets so they will no longer look like the furniture feet. Makes sense that it is shrinking up with the dry house.

I have some rentals so hoping to put the bamboo in one of them. I just need to figure out what to put down now. What would you recomend? Is putting plywood down and solid wood a bad idea? Is engineered flooring the way to go? I thought about a glue down enineered floor, but not sure how well the glue will adhear to this gypsum leveling conrete....