I think that a horse if good enough with a jockey also good enough to over come it will
Brew won a Melbourne Cup from 24. Not because he had luck, but because his Jockey was good enough to get him where he had to be to win the race.
Too many Jockeys think you need to go back or fight for the lead, but from the outside at most tracks you can get to where you need to be without using the horse up.
on another site they have stats for each br.
These will have you taken back, most horses will win from gates 4 to 6 at most tracks.
There's also a paid site which has each jockeys stats from everything you can think of inc. Gates.
Oliver is of cause the best.

The one thing that gets me is jockeys who think they HAVE TO GO BACK!