I am writing a short update on the project as there was no movement on a content but on a administrative level: I applied for a research fund (consisting of 10k €) and made it to the final round. Unfortunately I got declined so I again have to look for some more money to realize a empirical study about the device. mmmmh, could crowd funding work?
The good thing is: a lot of theoretical work is now already done due to the application and I still can use it for my MA thesis..
I will keep you updated!