Vessbot.
I agree with all you have said but jeez I didn't realise it was so complicated. I always thought it was point and push or pull as appropriate.
The one thing though that is missing from your analysis, is any mention of the importance of a good scan. Without it, all talked about above, will add to the complexity of the operation. With it, all becomes manageable.
Do like the "death grip" reference, which along with deficient scan, are the two principal causes of manipulative difficulties.
Cheers. Maui