For clarification purposes, I don't know what I am talking about, but every carburetor I have ever worked on, once I set the float level as per the instructions, the flat part of the float (closest to the carburetor body) was parallel with the carburetor body when held upside down so that the needle was seated in the seat. I suggest that you start there and give it a go. I can't help you with the float drop setting. My seat-of-the-pants technology has it's limitations.
