we are switching from Baby's Only to Holle but I don't understand the preparation directions. Does anyone use it and can you help me figure out the following: How to make a 4 ounce bottle How to make a 5 ounce bottle How much water per scoop is what I need to know. US formula is 2 ounces of water per scoop but what about Holle? Thanks is advance. I'm posting this to a few forums.