For classification it's F1 score but for other task it maybe and I don't think that's problem. we just have to log it right?

Correct 🙂

Give me few days, I will work on your sugestions and then let you know if I am not able to do this

Sounds good!
BTW:
previous_tasks = Task.get_tasks(task_filter={'tags': 'best'}) local_model_file = previous_tasks[0].artifcats['my_model'].get_local_copy()