Mark,
There are better than some available. Bob Kovar probably has some of the better ones. Mine has a "Grease Cup" at the end of the shaft, a very small grease cup BTW.
My machine started squeaking one day, I traced it to that fitting. I actually removed the cap from the grease cup, inserted the grease gun as tight as I could and placed grease that way.
As soon as I can remember to unscrew the cup I will attempt to get a "Zerk" grease fitting to fit. Probably metric.
I see no reason for not having the combination of speed reducer and the servo.
ferg