Thorns, with further research I've restricted the Inside Barriers Method to sprint races of a maximum distance of 1,400 metres. Unfortunately due to circumstances I haven't kept records.

Out of interest, yesterday there were 8 qualifying races - an inside barrier horse won all 8 races. There were three good divvies (Unitab):

Quirindi R6 - $14
Kalgoorlie R5 - $30
Bendigo R2 - $69.