That looks awesome! Glad my experimentation has at least helped one person in a minor way. I plan on using my system myself at some point as well. It may be a month or more though since I need to get a larger SSD (to fit a Windows VM) and then a Tobii 4C first. I might end up using some of your hotkey-based mechanics as well, or maybe even porting your code to use OSX (should be easy since it’s Java). I have a program that streams Tobii data from a Windows VM to the host.