Thanks very much, glad to know the new VGA boxes work for most.
To use Windows Desktop for calibration for shooting will isolate the problem as what RetroACTIVE has done here.
In fact, the gun can be calibrated anytime when you think your system setting has been changed, each calibration (the VGA box sends the commands to you system to have a white cursor to run from left to right, from top to bottom) will enable the gun to learn the size of your monitor, its resolution, reflesh rate etc, this is the basic to keep the gun accurate.
Any further problem, please email us at orders@act-labs.com and note to use "Act Labs enquiry" to avoid spam filtering.
Cheers