As i said i only worked 2 days with it.... not much messing around with it just yet... The first day the graywash day around 90-100 on Cheyenne PU-2 and the yellow rubbers, second day Colors about the same readings on Cheyenne Pu-2 maybe sometimes 110 with the red rubbers... i took a picture of the BNG day lemme know if it helps to see it !!