Thank You Tom,
I will try to understand and adapt these things to open water, and see how it goes.
Cause we dont have someone to train or watch the way we do the drills and give us some feedback its a bit hard so see the errors, and where we need to improve.
But the concepts about the balance propulsion and streamline we understand, and our focus is to pratice it and try to master it.
I really apreciated your answer.
Here is the the facebook page of the group that make the open water competion, check it out