Dave J wrote:
Also, FWIW, I managed to earn an instrument rating (and use it for a
couple of years before the $ ran out) without ever learning or using
any variation of the 4 or 5 T's. Sure, some of the aircraft I flew had
old bits of label tape with those words peeling off here and there,
but they remain something of a curiosity to me.

My instructor used a cribbed version if the PIC syllabus, I think.

Nowadays, PIC sticks "5T's" labels all over the place. G