Just out of interest.

My father, very recreational punter.... uses the following system for years

Unitab ratings 100 to 95 for the quad legs

Puts $10 on each

Saturday @ Ascot was his payday

$255K @ 100%. He had 2 x 5 x 5 x 10 @ $10 for 2%.
$5,000 return

Its very nice when a $100 horse gets up in the last

Winners are grinners!