ultra hi fi vocal removal ensemble settings?

[lizheng100]

Looking to upgrade fidelity of vocal removal settings. Difficult to get close to mvsep premium. Their service uses additional training data which makes it higher quality.

Regardless, seems like might be a way to increase quality using ensemble.
Best I can get is an ensemble of melbandroformer and bsroformer with the following settings:

python3 ensemble.py --files kimOut/mixture_vocals.wav vipermelOut/mixture_vocals.wav --weights 2 1 --type avg_wave --output vocalsExtracted.wav

Any recommendations for improving ensemble?