the previous comment about senior jockeys riding out bush carries plenty of weight, i often spy one g. childs make a trip out to the country for 1 or 2 rides when theres a decent meeting on, & he usualy does the right thing often at good odds, from memory the last was in a cups race @ $6's, how it started at this price has still got me scratching me noggin.

as for 3 main factors, there far many more than that but i offer -

1. understand your class systems & how the nags, woops, horses move up & down thru them.

2. dont spend too much time worrying about weight.

3. look at your results & see which tracks, trainers & pygmies are working for you - you can often find an angle but establishing your own stable of "smart" trainers & jocks.

anyway these are but a few of the things i look at which regularily throw up good priced winners