Hullo Chrome Prince,

Yes this should prove to be a reasonably profitable approach as it has appeared to stand the "test of time."
Only one filter should be applied-do not back the topweight if ridden by a 3kg apprentice. No packdrill, no aspersions, but only support the runner if ridden by one of the top five riders.
The logic here is that in these relatively high class races the best horse gets the highest weight. Only one drawback....regularly, they receive imposts of 60.5kg upwards.
Accordingly, the connections recruit a 3kg apprentice to ease the load. However, quite often, the apprentice "loses his/her way."
A relatively inexperienced youth finds him/herself in control of a very powerful "adrenalin-pumped-up" animal and some find it impossible to control this highly charged thoroughbred athlete.
To put this into perspective, would they allow a "rookie" to drive for one of the top teams at Bathurst?-I think not...those cars, like a lot of thoroughbreds are worth a helluva lot of money and connections are adverse to risking damage to their valuable property with an inexperienced rider.

Cheers.