Of course, “better” comes at a cost. A feature-rich, low-latency, telemetry-capable firmware requires more flash memory, more rigorous testing, and possibly a slight increase in quiescent current. For a $0.50 component in a million-unit consumer device, the original firmware’s simplicity may be the correct business choice.
Look for the "Mirror" setting in the Service Menu. Where to Download Tsumv53ruul-z1 Firmware BETTER
Typically adjustable between 3.3V, 5V, and 12V via jumpers on the board. Common Board Models: T.V53.03, CV56XL-F. Troubleshooting & Finding the Right Firmware Of course, “better” comes at a cost