We all have our own ideas on when to replace batteries but looking at the Show And Tell Thread got me thinking about when to replace servos. I saw pictures of jets in that thread that had hundreds of flights on them. People stated how many sets of tires they even went through but no mention of the jets servos. So when do you replace a servo? I know we can replace sloppy gears and servos that begin to act erratic but what about the servo that is working fine and has no slop (with or without previously replacing the gears). How long will it last? How many flights do you trust counting on that motor to keep working? I have often thought about planned replacement for critical control surface servos. I was thinking the 200 flight mark for an otherwise perfectly fine running servo. What are your thoughts on this?