Are you planning to do a lot of milling? My X3 which is quite similar may get a squirt from an oil can once or twice a year and after 14yrs use making quite a few models stills seems to be working fine.
The KX3 does have one shot oiling and gets a pump maybe once for every hours use but that more to reduce stiction for fine movements and in a hour it will be moving far more and a lot faster than a manual mill.
I'm still on all the original gib strips and don't see a need to change.