I agree with PM. And depending on what failure odds (anecdotally) are, I also agree with preemptive action based on usage. If your LC is a daily around town vehicle, and will never see remote places or long trips, I see HG as a good idea, but maybe unnecessary as PM. But if it is about to...
As much as we would like otherwise, everything has a life expectancy. Even valve stem seals! Haha...it is amazing how long everything does last though on these.