I'm no pro either (though I still aspire) but one thing I do know is that if you back race to race and follow on next race day you will definitly lose all you have won, your bank and more besides (I talk from experience) there have been losing runs beyond belief, like 30+ broken by a dead heat 1-1 fav followed by another horror run etc.

The post would be too long to tell you all I know but here a few things:

(1) Back each selection as if it was 3-1 even if it is 1-1, when it wins at over 3-1 you win more than the target (to be deposited into a reserve fund), when it wins at less than 3-1, you don't get your target BUT it keeps the kettle boiling

(2) Bet the selection @ Top Fluc if it is pre-post fav or less than 4-1 pre-post, otherwise bet at Best of three totes/SP.

(3) Consider the following: bet week to week (or day to day if you are backing every day) in the folowing manner:

use 8 seperate banks, one for race 1, one for race 2, etc etc up to race 8 , so you bet race 1, next bet race 1 , next meeting etc etc.

(4) consider grouping bets, eg. group race 1&2 as one bet, race 3&4 as one bet etc etc.
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Good luck!