Here's one I've been following for 3 months. Metro only

The rules

must be beaten no more than 3 lengths at last start.
eliminate all country and provincial form
barrier 1 to 9
last start within last 21 days
weight +/- 2.5 kgs
betting in the top 5
riden by top jockey.

I'm looking forward to the analysis here as you seem to have all the important points taken care of, I use most of em except I use 3.5 lengths, and 3.5 k'gs. The only thing you need to clarify is Top Jock, I mean something like "in top 5 in jockeys list for that meeting , jointers in/or out etc" so that it is definite whether it's a bet or not.

Top 5 in the jockeys list each state. Those who are equal are to be considered.