Let's use Myers 108% manipulation to sync his distance difference with CE884: 79.2ft x 1.08% = 85.536ft  85.536ft - 79.2ft = 6.336ft 6.336ft - .9ft = 5.436ft difference Now refer to the distance per frame traveled from CE884 z161-z166 = .18ft per frame traveled The WC difference comes in the span of z133-z161 = 30.2ft (Station# 299- 329.2) 30.2ft  x .18ft = 5.436ft How many frames might we be dealing with for that equation: 30.2 /.18 = 167.77