Painted sill
The marks are honest against water, not against a thumbnail.
Every morning Calum zeros the draft stick on a pin we keep on the sill. If the zero drifted, the lock does not fill.
A thumbnail is a story. A painted mark is a number. Clearance is written on the card in degrees, toe and heel separate, because Grandad air does not wear a window evenly.
We will show you the wet band where the pool refused to meet. We will not show you a cartoon trajectory. If you need a cartoon trajectory, Pearl Street still sells those.