"but not class....the last of the big three factors - and that is where the system could fall down".

The odds take care of that Chuck. No Class to suit the race? No $7 or less PP.

Don't worry though, systems fall down all the time, including this one I'm sure. I had a few long run of outs with it. But I've also had some wonderful longer runs of profit.

I forgot one rule for this system: If more than one runner found, choose the one with the shorter odds. If same, ignore the race.