You also drew lines that were not straight and talked about lines going straight down the long axis of the cylinder and showed an example of straight lines across the flat end of the cylinder but then talked about holes that are circular rather than straight.well, it doesn't work like that
you cannot have spiral holes, I told you the holes are linear across the cylinder length
but let the cylinder thing, we were talking about the circle
How do you expect us to answer your question when you refuse to tell us what your question is?
Edit: I think I see your objection. The "spiral" I was talking about was not a spiral down through the cylinder (like the threads on a screw) but a spiral on the surface of the end. Like the first part of the yellow brick road in the Wizard of Oz.