Yes I did shake the pouch well, pressurized with the pump, heard the pop, and bled out the excess air. All as per the Quoin website current instructions.
I was thinking, just like you mentioned, of trying to re-pressurize. The original pump I had (before ordering the replacement pump and main valve from you) sort of went bad by beer running up into the tube. The tube can't be detached from the pump bulb and was not able to be cleaned. I'm trying to avoid this with the new pump.