Does that about sum it up?
I'd say it's more -
1) I have questions
2) Answers, some good, some very bad, none complete
3) Research leads to more complete answers.
4) More complete answers presented to see whether others agree.
5) Most others don't agree.
6) Careful explanation of why answers seem to be more complete, with set of simple questions leading to those answers and supporting references showing why those answers seem correct.
7) Refusal by most others to answer set of four simple questions. Those who do answer have answers that agree with OP's answers. Those answers lead to the answer to the original question.
8) No one able to answer original question using accepted math/physics/gas laws to explain heating when transfilling.
OP departs. Ultimately either someone will find an error in OP's posts and answer the original question, or others will continue believing in imaginary compression heating.
These things are clear:
1) There is no volume of gas in the original high pressure tank - no single cc parcel of gas that does anything other than expand - whether it stays in the original tank or leaves the original tank. All the gas goes from an initial compressed state to a final more expanded state.
2) Physics and gas laws say that gas that expands always remains at constant temperature if no energy is added or removed = "free expansion".
3) The gas that remains in the donor tank gets colder, so energy must have been removed from the gas in that tank.
4) Gas that leaves the donor tank gets hotter, so energy must have been added to the gas going to the destination tank.
5) The sum of energy removed from donor tank and energy added to receiving tank is zero since no energy was added or removed to to/from the original system of gas.
The answers are there if anyone wants to look for them.