Day before yesterday we did an experiment with our Dial 'N Sew machine and one of the new feet. The D'NS machine uses high shank feet and I'd bought a ZZ foot to try because the toes really curl up out of the way. The toes on the original foot are almost flat by comparison.
I sat and watched as my wife sewed a couple shopping bags. That curled toe foot glided up and over the seams and multi layer joints like they were not there.
It is aluminum, and I'm hoping it lasts.
Joe