Hey Phil,
so I have written to predictors in one notebook to run the different predictions on the same text. So I have 2 HuggingFaceModels with 2 BatchTransformjobs in one notebook. The last issue I am facing here is that in each of those two batch jobs I have to define the output path:
batch_job = huggingface_model.transformer(
    instance_count=1,
    instance_type='ml.g4dn.xlarge',
    output_path=output_s3_path, 
    strategy='SingleRecord')

So I am getting two output file when I just want the predictions of both models in one. Is that somehow possible without a workaround?