I have uploaded a new design talk. It is about a new tub scrubbing devise that I have designed, modeled, and prototyped. It shows all the steps I took from the original idea I had all the way to the prototype stage. In it I also discuss several changes that could be made to make it better and perhaps even cheaper to manufacture. Check it out if you are interested.
Link to free-to-watch video https://www.youtube.com/watch?v=baONrk-3RQE