My husband and son and I were on our way out to dinner at our favorite restaurant, Sea Fresh (mmmm, calmari!) and I nearly tripped over a big box on our drive. I squealed, scaring both husband and child, and grabbed the box, getting into the car.
As you can see, the whorl is square, with two notches on each side. It is indeed well balanced and spins forever. It's heavy (compared to my featherweight bossies!), but not too heavy, and I picked that baby up and grabbed some of the merino and spun a really fine thread sooooo easily. Oh, I LOVE it. I'm going to be spinning a lot on it, as my knee is still too painful to treadle my wheel.