I have never noticed Catalpa growing here in Petaluma, but it probably does as I do know where some are 30 miles to the south, that being where I got the Catalpa which I first built with.
I have spent much of the last two days carving the headstock on the P -000. I flung myself off a creative cliff and have been working to balance the thing ever since. I am at lunch at the moment, but when I get back to work I will take a picture of how I changed it from the pictures here, which I took a couple of hours ago.