Hi Party, re. betting only if (odds*1.2) is available I checked an old system someone wanted me to test, and it consistently came up a loser, picking only the overlays it turned out a nice little earner.
Only problem he can't bet watching the prices.

Even if one makes a few mistakes, because the odds change the last minute it's still OK.

I tested an other very simple staking system on the neural one:

increase the bets by one unit each time you lose up to 31 units then go back to 1 unit, it turned a profit of $435 level and $5200 with the staking.
If I didn't have a much better rating I'd be tempted, but jeeez the long outs don't suit me at all, plus too many bets for my liking.

I suppose I never bothered about overlays because I bet long shots which are by their very nature sort of overlays anyway, but if you can price your selections accurately, that's the way to go.

Cheers