Hi @acecool, sorry to hear about your continuing difficulties. Regarding lag/high CPU usage, have you already tried to kill any processes currently running on your system that may be consuming resources in the background? Certainly worth checking to see how this impacts performance.
Did you have the opportunity to test your setup with other users for comparison? In addition, if you do indeed have any images of your current setup that you would be willing to share, that may also prove useful.
If you feel the device itself may require a more in-depth analysis, then I would encourage you to contact Tobii Tech support directly @ https://help.tobii.com/hc/en-us/requests/new who may be able to perform diagnostics on the device as necessary.