I've also been watching that bruise under your thumbnail move upward over the last few months.
Glad to finally see her buck! How many rounds did you put through? New barrel or old one?
FYI...
The slow motion video is a good illustration of your trigger pull. Since you were pulling with the first knuckle of your index finger (instead of the end pad), seeing the muzzle drop when the trigger broke was easily noticeable. You should have gotten a number of impacts low and to the right (five o'clock pull) when you were shooting with your left hand.
Now... I think
this is one of the most beautiful pictures of a 1911 that I've seen in a long, long time. We need more of them, well lit just like it, of the final piece.