I single only as a means to play a cheap ticket and still be "in the game" when it comes to pick5 or pick6 tickets. I have missed many times by playing pick 4 with a a-ab-a ab, b-ab-b-ab having all the winners but not on the same ticket. I also hit the rainbow pick6 at gulfstream last december with 3 singles on a A -AB-A AB-A- AB ticket at a cost of $1.60 and got back a little over $4000. One of the singles being a $23 horse that was 6-1 ML. I don't have the bankroll a lot of others have to spread deep in races and if I can't single some where in the sequence I will pass on the wager all together.That's just me. Its like playing the lottery for me. I buy one ticket to be in. If its meant to be.