Excellent choice of woods and superb execution of the minimalist theme. Too many get over involved in detail and decoration and lose the true essence of art for art's own sake.
This is just that, a true work of the minimalist's art.
My first thought about your first endgrain project was that this is the most perfect flaw free project I have ever seen. What could possibly go wrong? Nothing! It's the best "KISS" project ever!