Bamboo stair tread

[Thadbow]

I wanted to try to grind some vertical grain bamboo lams so I picked up a stair tread 1x12x48.  When I started ripping it down, I noticed a few voids or hollow spots. Is this a common problem with bamboo planks and flooring and is there anything better out there?

[kennym]

I see mostly bad glue lines, there is some throwaway to all of it IMO.

[JamesV]

The verticle bamboo flooring seems to be more uniform, cheaper to use with less waste. It can be bought in 3 1/4" X 5/8" X 74 3/4" long. Packaged 12 pieces per package.