Ah, it’s ok! 
Though in that post I was just outlining about the 3 different rotator formats that UE5 blueprints uses under the hood.
It sure is worth mentioning here though, because it’s related: ‘Get Base Rotation’ uses the standard format. Applying this format would cause a hitch at +/- when mashing together the three above-pictured 'Rinterp’s together in such an unconventional way.
But combining the control rotation and normalized control rotation formats to the three Rinterps into a frankensteined rotator that stays buttery smooth through 360 degrees does work. For reference, here are the 3 different formats I’ve come across:
Standard rotation:
Roll: +/- 0 to 180
Pitch: +/- 0 to 90 (this is a bit confusing, but it goes up and back down)
Yaw: +/- 0 to 180
Control rotation:
Roll: 0 to 360
Pitch: 0 to 360
Yaw: 0 to 360
Normalized control rotation:
Roll: +/- 0 to 180
Pitch: +/- 0 to 180
Yaw: +/- 0 to 180