Michael,
Here is an example to help you out that is familiar to you:

These are your selections up until you changed the selection criteria in this thread along with the prices from unitab.

Kembla R1 no.1 - Atlantic Air = $3.40
Kembla R2 no.5 - Elastane = $9.10
Kyneton R3 no.4 - Road Novel = $3.20
Muswellbrook R2 no.1 - Scotch Gem = $2.70
Muswellbrook R4 no.6 - Ray. = $4.20
Mildura R1 no.4 - Samadji. ($1.40 pre-post). = $1.30
Casterton R2 no.6 - Portland Prophet = $2.30
Casterton R3 no.1 - Pasco = $2.10
Casterton R4 no.6 - Jarraconi = $3.20
Cranbourne R3 no.10 - Happy Honey = $8.60
Hobart R1 no.16 - aaaaa's Jubilee = $6.80
Hobart R3 no.6 - Special Resolution = $3.10
Kalgoorlie R1 no.3 - Voodoo Rocking = $1.80
Kalgoorlie R4 no.5 - Daughter's Demand = $6.80
Sun Coast R9 no.1 - Mystic Vibe = $2.90
Tamworth R3 no.3 - Katobar = $7.00
Tamworth 8 no.1 - Sir Winalot = $3.60
Taree R4 no.1 - Barons Court = $1.70
Rosehill R5 no.1 - Nuclear Sky = $3.90
Eagle Farm R6 no.1 - Rampant Lion = $4.20
Morphetville R5 no.1 - El Maze = $4.50
Morphetville R7 no.6 - Magical Dane = $4.30
Moonee Valley R3 no.8 - Sand Sweeper = $2.40
Moonee Valley R6 no.3 - Innovation = $8.30
Moonee Valley R7 no.1 - Gunfire Messiah = $3.50
Benalla R1 no.8 - Moon Maiden = $3.80
Gold Coast R4 no.2 - Showciti = $2.30
Gold Coast R6 no.1 - Agrios = $6.20
Toowoomba R1 no.1 - Golden Flute = $2.00
Toowoomba R3 no.5 - Azzaland = $1.50
Belmont R1 no.2 - Superscenic = $1.60
Belmont R7 no.3 - Chachi. = $2.20
Bendigo R2 no.3 - De Mars. = $3.30
Ipswich R1 no.1 - Spectacular Pic = $7.60
Ipswich R5 no.2 - Norse Code = $3.30
Ipswich R6 no.1 - Simplest = $2.30
Ipswich R7 no.5 - Jellicles = $1.40
Ipswich R8 no.3 - Jackpot = $5.10
Mackay R4 no.1 - = $3.00
Seymour R5 no.2 - = $4.20
Seymour R7 no.1 - = $13.00

Total number of winners = 14
Expected winners (sum of 1/price) = 13.57

CHI SQUARE RESULT = 88% chance that the results were due to luck.

Based on that there is no reason to either keep or throw away the system Its still an unknown.

Hope that helps you out ....

Good Luck