I posted a pic of an oak root hollowform the other day. Then I tried a couple more but without quite the same results. The taller one was a little more bland piece of wood but it was also full of pea sized rocks that the tree had grown around. After destroying several hollowing cutters I called it good with fairly thick walls and an even thicker base. The little squatty one was destined to be a natural edged bowl. It has some nice burl and color in the wood and an interesting edge. As a group, they look pretty good together though.