Thanks for the guidance.
Yes, the 3ed n 4th sl on the left was on 2 bar principle. As u said that there were few more advance things added to the flow method, so where can i find them. I'd like to learn to fish properly n not just the initial stage. So i request u to please teach me or provide me with the advanced steps included in flow method.
I'll be really greatfull even if the documentation along with few charts are made available.
Thanks in advance.