The chrome trim ring isn't a trim ring, it's two trim rings. There is a larger piano black ring and a smaller, inner chrome/plastic part. They snap together.
All three circles (the speed, tach, and fuel gauge cones) all come off together. Be gently and use a spudger to work a large ring loose and then work from there around.
The little chrome piece rattles against the large piece and the large piece rattles against the gauge cones in the dash. I lined the larger ring with electrical tape as a damper, then used another piece to affix the chrome to the piano black part in each ring. I wasn't yet willing to resort to glue or other non-reversible methods.
As-is, it's 85% better. There is still a little rattle that I have yet to isolate. Will post some photos later and also update if/as I fix the last of it.
Sadly, with this noise mostly fixed I noticed another high frequency rattle that almost sounds like a buzz. Seems to be coming, intermittently, from the driver's side mirror or the A pillar tweeter. Happens with the radio off.
2008 Red Line
D30 Override red on red
Monsoon stereo w/ USB input
Custom lighted Windrestrictor
K04 Big Wheel Turbo
Solo Street Race exhaust
Norm's custom rear facia