Hey Barney,
Here,s one I just made up that might interest you.

Mark down all horses that ran 1st or 2nd last start in current campaign.

Go to racing andsports -Don Scott ratings - Must in top 2 shortest asessed prices.

Go to UNITAB - Price must be between $2.80 - $4.20 (or whatever price you decide on)

Time required 10 minutes.