I do like this one, George but then I am a sucker for anything with a hole in it LOL. I have been doing a few of these myself and getting the shape right as you have isn't as easy as it looks but you seem to have no problem.
Where did you get mulberry from? Never seen any round here.
I got quite a lot of Mulberry burr from Interesting Timbers about 5 years ago and it has been stored inside so it is nice and dry.
I am starting to try and use up some of the wood I have had for some time rather than keep getting more.