"It is indeed a clever design and well executed, but it is not some gravity latch  or for steep slopes. It is a safety latch to avoid objects from flying out the compartment during sudden braking or frontal impact. The seatbelt ratchet mechanism works in a similar fashion."

"If she understood "prototype, test" in Design Thinking as a linear, one-time event, i.e., one prototype, one test and you're done, then she doesn't understand Design Thinking at all.Creative people also work in different ways. Judging one's creativity and quality of one's design based on how tidy or messy one's working environment is equally comical as critizing why it took over 1,000 prototypes to get a vacuum cleaner design right if one knows design."

"No obvious to me how one changes drill bit in this design. If this is an auto-chuck, the user needs to grip the chuck which would be difficult with the holder blocking half the chuck. Drill bits also come in different sizes and lengths and the depth gauge needs to be able to "zero" the depth based on the drill bit length and then retracts to set the depth. Adding a movable pointer should do the job."