If it's the thread I started a long time ago... The one that pictures Old and New Style filters, New with the longer tubes, includes Band-Aids among Tools Needed... I don't remember the little spring metal retainers you show. Also, I remember our connectors looking more rounded with a "garter spring" inside, not three little detents like you mention. I wonder if Ford did something different after the 2002 chassis I worked on.
I tried blowing through the Old and New filters. First Ford I changed, I could barely get any air through the old one. New one, I could blow the dust on the floor around, standing. Taking that restriction off has got to help the Pump.
GOOD on YOU! It's a worthwhile little maintenance task and will probably be easier the second time.