willydstyle

My Tern Link D8 doesn't have any seatpost markings other than minimum and maximum insert depth. I'm very sensitive to my bike fit being even slightly off, so I'd love to have a way to be able to set the seatpost exactly the same height every time. My first thought was a silver sharpie, but there's a thin coating of grease on the post that I would guess would dissolve sharpy, and I also think it would get worn away quickly when I lower the seatpost anyways. I know there's a gadget for brompton bikes that let's you set the seatpost height, is there anything similar for non-brompton bikes?