This is my own made custom romer-G key cap for left control key currently installed on a G910.
I've printed this cap in black PLA and clear PET (to see the back light), the print took around 30 minutes and feel nice while tipping.
I will upload an other version of this key cap with different top shape and clear insert.
Doesn't realy matter PLA, PETG, PET, ABS
as you want
Be sure to print flat on the bottom
Enable active cooling
Realy slow print speed (20mm/s)