Beyond "one shot" cloning with XTTS V2 model - getting a better clone?

[CalculonPrime]

I'm running the one shot conversion using the official XTTS V2 model:

model = "tts_models/multilingual/multi-dataset/xtts_v2"
tts = TTS((model), progress_bar=True).to("cuda")
tts.tts_to_file("The bombers take off in five minutes",
                speaker_wav="source-voices/reagan.wav",
                language="en", file_path="output.wav")

and it's recognizable as "Reagan," but it could be better. What would be the next thing to try to get a better clone?