Hi axledog.
No the stats i post are for everyone maybe some people can use them.

Can't help you with the placings as i use beaten margins rather than
placings as i find this a more accurate guide to a horses performance.

These are part of my selection technique i actually haven't recorded
beaten margins data as you would probably have to put them into groups.

Eg all horses that were beaten say <1.0 or less would then include multiple runners unless you wanted to break it down say( 0.1)( 0.2)( 0.3) etc which
would take forever to get sufficient data and the grouping wouldn't be an exact stat with several runners making up that stat thus giving a false reading.

Last stat winners win around 15% of all races but i don't know 2nd-3rd.

Sorry the above answes iare not more helpful.

Good luck with your system building.

cheers
garyf.