I'm working on the exact same restoration at home. Green Taito to Tan/Brown elevator action.
Wished i had bought the CPO from where you did. Mine doesn't have the black on the sides and to top it off it is about an 1/8" short on one side and 1/8" long on the other side when centered with the joystick hole.
Where did you get your centering grommet? Mine is pretty good, but i need to get one for an arcade that i visit. I'm tired of playing on their broken machine.
If mine turns out half as good as yours it will be awesome! The tan/brown i just kind of guessed at. I guess as long as it pleases me that is good.
Great job!