another vote on the tape idea
I’m guilty of using too much grease on the seatpost - and not-a-surprise the seatposts have slipped on my bikes
actually first discovered this when glancing at pics I posted on this forum - the seat height appeared to be low and then realized the post had slipped
initially I used a small piece of black tape to determine if the post slipped - but recently began to use 3M red reflective tape (pictured below)
I will be watching the index number each time I ride.
I will also be doing away with the cam quick release and use a nut and bolt. It should be more secure and like someone said it will make my saddle harder to steal.