It all has to do with memory. I bought a few of Troys' Black locust slats last year. And made a Meare heath hickory backed bow. It was the first bow I built that I thought was beautiful. Like you I narrowed the tips four or five times. There was a slight vibration I could never get rid of. When Bob said I think the thump is just the nature of the beast with a straight limbed bow. It made me think of that bow.
So I must answer your question with a question. If you are what you eat, then someone who eats lemons is sour. If you create something of beauty then you are ,what?
Then again I could be talking just about your bow. I see perfection , you see a flaw, it's all perception beauty and the beast.