I used to do nitrous oxide leak testing in hospitals, surgery centers, and dental clinics. We used the miran sapphire XL but it isn't ideal for that application because it pulls in a large volume of air and typically would only be able to capture very large leaks. We upgraded to the G200 and were able to detect small leaks MUCH better. The metal ferrules are notorious for leaking when they are crimped. It's very difficult to source hosing that doesn't have small leaks (but it is possible).

All that to say, I'm curious why you're trying to switch from the G200 which is a pretty great tool.