Yesterday I built the first touch pad, here's how it went:
First of all, I bought a 600mm x 300mm sheet of 1mm clear acrylic, which is more than enough to fit all 7 pads. I learned that 1mm acrylic sheet is almost double as expensive as 3mm sheet. It is also significantly more difficult to find. For both these reasons, I might consider alternative materials in the future.
I'm not sure if Github is the best place to document a project with both hardware and software. Any thoughts? In any case, I will make sure I upload every file and document the repository so anyone can replicate or modify the project.
After cutting the acrylic, I went on to cut the electrodes using a Roland GX-24. I checked this website: HOW TO GET WHAT YOU WANT. This is a great resource for e-textiles and I followed their advise on vinyl cutter settings, although I went a little higher on Pen Force as I have had problems in the past with blades that aren't as sharp as the first day. Settings were Pen Force:100gf and Speed: 1cm/s.