Nice job, and nice pictures.
Thank you for thinking to help others.
You may have done this, but not pictured it, but at this step in the process,
as you begin to depress the piston back into the bore, I open the caliper bleed screw. This flushes the sediment and old dirty fluid that has accumulated in the caliper out the bleeder and prevents the contamination from being pushed backwards through the valving into the master cylinder reservoir. If this is not done, it is not uncommon to see the master cylinder fail a few months after the front pads are replaced. If you are careful to only open the bleeder valve after a little pressure has been applied to the caliper piston and to close it when the piston is bottomed, but before pressure is released, you will not introduce air that requires you to bleed the brakes. (Although it is not a bad idea to flush the residual, old fluid and replace it with some cleaner fluid from the reservoir. And, with both road wheels off and the front end up, it is a perfect time to bleed the calipers anyway.)