Excellent analysis. Yes, zero penalties had to be the reason the score was lower than I "felt" it should have been.
The GameGolf app is cool. It has statistics and tools I haven't even used yet. I just found out recently you can check your strokes gained against higher HC averages instead of just the default scratch comparison.
I'm not convinced that a tee marker is a 'device'. Is everything man-made a device, by your definition? If a player purposely dropped the ball (for an unplayable lie, for example) in such a way as to have one foot on the kerb of a carpath or a sprinkler head would he be in breach of 14-3?
Not much of an update, as due to a lot of work in the run up to exams, I haven't actually hit the range much recently. I've also quite enjoyed taking a break from endless swing thoughts and just getting things feeling a bit more natural. The flight is now high, with a 7 iron flight looking more like what my pitching wedge used to look like. The shape is now usually right to left with the bad miss still when I get the face closed at impact. Distance is definitely better, too, with a 7 iron now carrying around 170 on a good hit - at least 10/15 yards longer than with that shorter swing I had around the turn of the year. I'm going to get on the range a bit more in the next few months and will start uploading some footage, but things are looking and feeling pretty good.