Thanks Dick, That's also partly why I ask as my attention is more on more on the races over there and it's so readily available. I'm sure it could yield some important info if one could only learn to use it properly. I know human athletes who record this info about themselves constantly in their training journals, partially for being able to peak their form at the right times, etc, I'll bet some horse trainers do the same for their horses.

But do we know enough about how they do the actual weighing though, as I'm sure equines fluctuates daily quite a lot as we humans do as well, do they weigh in at about the same time of day every time for instance?

It sure would be interesting to run some large data analysis on this to search for patterns, quite a lot of work though.