Earlier quoted context omitted.
Yes, I've shipped a hardware project on kickstarter, and (just) on time - the original article is a tad unfair, as if they were the only ones to ever ship. And I designed my own hardware ..... the trick is to design your hardware BEFORE you announce your kickstarter, not after ....
What level of fidelity (e.g. self-made prototype, small batch of manufactured prototypes, etc.) would you recommend before going on kickstarter?
I think you need to have something real to show people, absolutely NO handwaving.