Hardware Review: Logitech ERGO M575 Trackball and TESmart 4K 60Hz 4:4:4 KVM Switch

For my birthday this year, I got a Logitech ERGO M575 Trackball and a TESmart 4K 60Hz 4:4:4 KVM switch. The trackball replaces my ancient Logitech Trackman Wheel because I've had to replace the micro switches too many times, and I doubt the PCB will survive many more desoldering attempts without pad damage. The Switch is a new idea for me: I upgraded to a QNAP NAS last year, and it has KB / Mouse / Video connectors so I want to "go direct" instead of via the web interface. And ... when I fix other peoples computers, I no longer have to unplug my keyboard and monitor to use them.