Put a Angel Wing Seal on the shoulder of your vacuum cup and receive forgiveness that you’ve never seen in any-other vacuum chuck system. Forgives equals resilience. The other systems all share one similarity, despite how different from one another they look. What they all share in common is if there is any separation / a gap formed between your bowl and the cup the vacuum is lost and so is the hold on your bowl. That gap can come from a sudden catch that the other systems never recover from. Angel Wing Seals allow .50” (1/2”) or more gapping between bowl and cup before completely letting go. In plain English: if you pull hard enough you will overcome the force of the vacuum pressure but if the pulling force is released the bowl / vacuum holding will recover pulling the bowl back to the cup. The bowl will likely not be back on center but your bowl will not be on the floor in pieces. All is not lost. Release the vacuum, re-center the bowl on the chuck and turn the vacuum back on so you can continue to finish your work.