The blank that Travis used for his recent demo in Memphis was Hackberry. After the meeting Travis had to help judge some pieces for our club that are going into an upcoming exhibition so I had some time to kill. I saw a small log in my stash and to my suprise it was Hackberry. I decided to see what I had learned from Travis. This measures 3" dia. x 3-3/4" tall. The base is 3/4" and the opening is 1-1/8". The last pic shows the piece on the lathe and why you need a big lathe.