Figure 1. Early round injection which shows deformation and some flash
Figure 2. Large divets in thickest regions of part
The critical dimension of the hole inner diameter on the galaxy piece was measured for 20 different galaxy parts from our optimization run. The average hole inner diameter reduced from 0.134in before optimization to a much more ideal 0.1317in after optimization. After assembling the complete yoyo, we found that the hole sizes on this latest batch of galaxy pieces spins well on the rivet and the weight distribution encourages spin as the yoyo moves.
Figure 3. Late round injection which shows much decreased deformation and crisp edges