I thought the Ngunnawal system was great but try this one.Taking ideas from MG's Sky Rating system yesterday and TO's DART system, this system is called "Twins".
Rules: in each race where Unitab has either a pair of 100 rated or a 100 & a 99 pair. Lay the longest priced 100 rated horse if a pair of 100's or if a 100 & a 99 pair, Lay the 99 rated horse.

On yesterday's races 19 bets 0 losses 4.655 L nett profit!! Let me re emphasize this $1000 liability, no losses for a return of $4,655 in one day!!!
Try it for yourselves, good luck, RP