There’s a certain logic to this, but if you’re building a dome of 8’ radius or greater, you’re going to get to a point where you have to lift up the base to fit on the bottom rows. The torque on the joints could get extreme, and that could cause the joints to fail. The cracked hubs would have to be replaced, and if you only had the minimum quantity to begin with, you’d have to order more and wait for them to come. Just start at the bottom and work up. You won’t be sorry.