Lourdes Pacheco: One Head or Two

Lourdes finds a hidden service folder on old gravimeter cards that records which head was switched on, where, and when. It clears most of the old shops' disputed nights and turns five into overlaps where one holder's name was on two trucks. She sends the method to every shop at once with the cost on page one. 226 says its own service records were wiped in March 2045. A man whose name was a crew-sheet default writes her where he really was.