A few months ago I was having some fresh lychee and decided to try saving two of the biggest pits for turning. First one I did as a similar hollow form but busted through the side. This one kept popping off the waste block. CA glued twice, added some hot glue, then a couple more additions of CA glue. It's more brittle than an avocado pit but does sand very well. Finished with BLO. Opening is 1/8". 5/8" tall, 3/8" wide.