Ok, I finished my product design degree a year ago with blind people as my target users. I am not blind, I just haven't unsubscribed from this shredding since.

I would recommend changing your focus. There are a million and 1 student projects on this. If you want to redesign assistive technology I would recommend aiming to reduce e the cost through open sourcing. That was my focus except I chose a bad product to redesign and it didn't work out. In hindsight I should have redesigned a electronic magnifying device, raspberry pi, camera, laser cut body and a monitor and your most of the way there. Look at the price of them then imagine how cheap it can be made for...