Bonjour Gil,
I fully agree with you ... if you have drain cocks on your cylinders

My friend Max made for me this D10 without, he had no other choice to apply this system on it :
Please note that several of my D10 have a coupled pump, mandatory to my opinion because of their very important steam consumption and and a desire not to use an electric one.
Question off topic, I add English subtitles to my videos, can you see them ?