SinSir, here's why I asked.
There is another PRS Thread asking about bone buttons for the DGT SE
(https://forums.prsguitars.com/threads/change-dgt-se-tuner-buttons.57722/), and these were recommended:
They are the Tone Ninja Genuine Polished Bone Large Tuner Buttons, Set of six (6) fits Schaller, PRS Phase I/II
(Manufacturers Part number: TN-BTN-RS28-6) $29.95 and according to the Thread, they fit the DGT SE.
Is the reason the ones I originally asked about won't fit is because a Phase III Tuner Button is not the same as a Phase II Tuner Button, but if so, then how do these buttons fit both Phase II and III Tuners?
They say style is everything!! Guitarists know this all too well. Queue these HOT ebony tuner buttons to transform you Phase II/III tuner equipped CORE PRS model. Upgrade your current tuner buttons with these stylish ebony tuner buttons. Includes hardware. For use on Phase II/III tuners only...
guitarbrando.com
PRS Ivory Tuner Buttons (6) Phase II/III OEM Replacement Parts $43.00