I know what you really want to do, but in two separate threads, there are hints than you haven't turned any pens or purchased much, if any, tools yet. It has been suggested that you try some basics before jumping into kit-less. Going kit-less on the first pen is akin to trying the first driving experience ever - in Formula 1 racing, or first swimming experience in a rip tide.
Get to know the tools and what they each do, and how each "feels" in your hands; get to know the feed back. Get to know the feel of turning different woods or different kinds of acrylics/cast blanks. With Kit-less, will you be using tubes or without tubes? Knowing the feel of the cast blanks or different woods is important. Tubes add strength in most cases and also weight. Some are able to make kitless without tubes. experience goes a long way. There is nothing wrong with having Kitless as your one and only goal, but getting to that will require a skill set that comes with lots of practice under different circumstances.
Learning all the differences and different "feel" and feedback while trying to make a delicate pen at the same time will lead to hundreds of questions as to "why" something did this or that. Often times the problems will be a combination of two or three different things all at once. This is why learning the basics with simple pens helps to identify both skills learned, different feel/feedback and problem solving - instead of trying to learn them all - all at once.
It should be assumed that in turning a kitless pen, you know the turning characteristics, strengths and weaknesses and feel of the different kinds of cast blanks and of different kinds of woods. OF the instructions of the different links and YouTubes above, the author of those take it for granted that once someone begins working on a kitless pen, that they have enough experience to skip the basics. They will not be telling you the basic characteristics that will be causing you problems.
Go for your goal, but learn the skills needed to get you there.