I was late to the party and ordered a single motor 12/20/19. My number is RN 113187XXX
443k in line. I am realizing I want a dual motor. Watching the Tulsa construction. Hoping for the new battery tech.
Chemically Milling or machining groves, similar to relieving for bends cans create crumple zones and built in crush patterns.
Aircraft have chem milled panels to reduce weight. Construction of SS panels can follow similar processes.