That's my understanding so far as well.
There are people who have used a T5 or a T6 on the same screw, and a T9 or a T10 on the same screw, but this doesn't surprise me. There's enough tolerance with Torx screws to explain this. In my case, I have a full set of Torx drivers anyway, so it doesn't matter.
I don't own an Apple Pentalobe P5, and have now ordered one, but for all the statements that it's necessary, I've yet to see anyone demonstrate it in use for this project.
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I'm assuming that what you are saying is that the fan and the wifi cable have standard Torx screws, on which one can of course use a Torx security driver as well as a standard driver. In other words, you weren't using a standard Torx driver on a Torx Security screw. Right?![]()
I found this video.