As regards the non ecore applications of the old Super Tech, now new Defense filter, also STP and Fram TLE they DO have a blue button bypass at the dome and a classic metal centertube as now cleary shown in dissection pic above. So in those cases your memory is serving you inaccurately.
The linked thread shows an Wally TLE Core 3614 which is NOT a >3" diameter Champ made ST/Defense filter which is what is now being discussed. So the link is irrelevant to discussion of the smaller Champ made filters.
And if you had read correctly the single black button reference was to the bypass on the old Honeywell which used the classic Fram nylon bypass button. As said again, they were value versions of an orange can.
As I and Sparks have now shown the small >3" diameter nere(er) Champ made Defense filters are non ecore.
For someone claiming to have no experience with Champ filters, and Super Tech, you seem to have no problem making inaccurate points about thier construction.