Weigh-in-Motion SCALES are just that, they have to meet all the certification requirements and are in fact accepted for billing and car light weights. As far as the Cajon incident. There were several factors not in the least being that the cars in question were moving on a weigh agreement might have been much like the "weight agreement" for the sugar beets. That one appeared to be fill the car til it overflows. If in fact the cars were requested to weigh the scale would most likely have been Colton; guess what they didn't ever get there. Seems to me that incident also had units in each of the consists with non-operative dynamics and other defects that made it a disaster waiting to happen. Andy