Alright, I'm throwing a bit at you here.
I ran through the test again to get to the results page to download my manual. Because, yeah; why not?
On one of the pages you have "somewhat" and "fairly" as options. I like that. I like "fairly" as the strong answer; rather than, say, "definitely always all the time"; as more people could probably relate to that. Otherwise, you wouldn't have many responses that are outside of "somewhat." And if all of the responses you get are middling, you don't have much to work with.
This time, I got 3 and INFJ. Nothing to worry about. I distinctly remembered some of my responses and, this time around, thought -- 'Wait, this particular response is actually a better one.' That typing is in fact also more plausible for me, personally, than INFP; and I didn't explicitly look at these questions and think -- 'Yup, this will give me INFJ.' That's a good thing.
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I like your manual overall. It's not meant for hardcore typologists, of course; and it doesn't need to be.
You might give some thought about the roles of the Enneatype and Jungian type descriptions that you give.
You give a thorough enough explanation of the Enneatype, and you place Jungian type as secondary to Enneagram. If you want to keep Jung at that scope, cool. I think it's appropriate. But if you do, you may want to handle it just a bit differently.
I suggest combining the whole thing into a single narrative, sort of; or reorganizing the narrative that you already give. This is train-of-thought here, but..
The manual says -- "Alright, here's your Enneagram type. Here's a bunch of good stuff about it. The end. You can learn more at [link]. (Oh, and here's something about a Jungian type or something.)" There's got to be a way to build one's 'personality manual' such that the Enneagram and Jungian type descriptions flow together, as if the two both describe your personality. I don't mean gathering descriptions for each Jung/Enneatype combo; there could be a way to segue into any description of the Jung type.
Maybe stick "Your Jungian Type" as a narrative above "Learn More." After all, it's some more information on the reader's personality. You may not need to flesh out your Jung descriptions any more. Including too much information about the Jung type would be overkill. There's no need to include, say, strengths of preferences for each dichotomy.
The following is all tentative thoughts, I don't feel so strongly about them and haven't given them much mulling over: You
may think about combining the lists for what one "scored highest" on and which Enneatypes are common for the Jung type that I get. Whittle it down to three entries or so. Either way, perhaps you could also place some
very brief verbiage about the other Enneatypes that apply to the reader. Again, this is much more of a mere spitball than my thoughts about the Enneagram/Jung descriptions.
Spitball
#2: You may
think about outright combining the two (Enneatype and Jungian) in the manual. Shove bullets for Jung types' "Work Styles" and "Self Care," for example, into those existing sections. That might not be appropriate to do.