Try, well for me I reckon that 3-1 is the cut off i.e. up to 3-1 ($4) back at Top Fluc, over $4 back at Best Tote/Sp is available or of course best of 3 totes if not (different mob)

Problem is what to use for the guide, for me I use the WA TAB-FORM pre post prices, I haven't really tried others so I don't know which is more accurate really, but I have been told previously that the Turf Talk radio prices are near the mark but I miss the broadcast or get tied up with a customer etc etc. so I just prefer the TAB FORM.

Good luck!