Thank God the 10000FA/20000FA reels are such tough pieces of kit. My idea of servicing them is to spray the Shimano grease into the lubrication ports every 3 or 4 months. Considering a couple of my reels are 3 years old and have been fished just about every weekend they have proven to be exceptional value for money. Oh yeah I lubricate the line roller bearing and tighten the screw as well every now and then.