Here's a super hacky wire/conductive pad version of Sotto:

Each finger pad is soft and not too noticeable, and also highly reliable and subtle. Plus, it's cheap and easy to make! Super excited to design a good enclosure here that is going to make it easy to access the guts and have more modularity on how many fingerpads are used, so it can be easily repurposed as a fast, on-the-go braille writer.