Good thing this thread got resurrected because I am getting ready to start my ODK. My question is about the hardiebacker floor. It looks like you ran quite a few pieces of Trex or Starboard under your island. I was concerned that if I ever had to crawl inside to get at plumbing or whatever, that my weight might crack the hardiebacker. I wondered if you felt it was plenty strong? I was wondering if plywood on top of the hardiebacker would be necessary.