I missed a couple Of your points.
Personally, the coating is easily contaminated and this effects the quality of the coating. SO, I coat directly after cast and DO NOT TOUCH projo's at all. I transfer with a spoon or just scopp them With my baskets.
Speaking to baskets. Its my preferred method BUT I have been standing some on Silicone baking sheets and standing smaller
Diameters into mini silicone ice cube trays, For baking.
The thickness of your coating is also able
To be regulated by sifting coated bullets. Longer ya "sift" the thinner the coating is.
When I first started I was not aware of this and when I cast a GC bullet I would carefully seat a GC, THEN PC and size. Now I know what powders are better for GC and seat AFTER-WITHOUT DIFFICULTY.
NOT ALL powders are created equal.
Some will coat easilly and not stick allowing basket baking.
Others coat beautifully but REQUIRE standing (Many Eastwoods)
Others still refuse to "shake and bake" at all and need to be strayed.
Remember ALL are designed to be straped with a neg elec charge to make Them stick. That's what powder Coating is / was.
I have a uTube channel and show the process. There is also a few orhers with channels desicated to this that may help Ya see how things work.
CW