Yesterday I glued the HD center piece on one site in place. I did use some epoxy with glass bubbles to do it. Before I could glue it I had to scrape the bottom of the channel and I even had to grind some biax carbon away because the piece is a little to high. I used a vacuum back to get the piece as tight as possible to the bottom of the channel and suck the air out of it, I also injected some epoxy and glass bubbles to the sides when the piece was in place. Today I unpacked it and the result is ok, but I forgot to take some pictures.