Got some sti suspension off Natski at a bargain price (cheers bud) and decided to do the grease nipple job before i fit them. Found it really quite easy to separate them and drill and tap the nipple in. Not to sure how much grease to fit mind but put some in and Will fit them to check it out and if need be put more in if they knock.
Can't wait to fit them now to see if it improves the handling on my wrx hawkeye.
I would say it was probably more difficult to remove them from the car, there is also a good video on you tube if anyone if thinking of doing the job themselves.