I'm done installing the floor. I first screwed down 5mm plywood underlayment (I did this to match the floor thickness of the existing floor in the livingroom). Then I laid down some 1/4" thick cork underlayment. I had just enough to finish the guest room. Then I cut and fit the bamboo floor planks, pulled them all apart, and then glued then together as I laid them down again.
Here is the floor cut and waiting to be glued.
Here is the glued floor.
Here is the cork underlayment in the guest room. I had virtually no usable leftover pieces when I was done. I had to screw down a few cork pieces because their curl was so unforgiving.
Here is the finished floor.
Now I get to install the guest room door and start doing the trim.