I have been doing my own saver version of backing up my main selection, but realized the one flaw. Instead of my normal WP on #1, EX Box #1/#2, slightly smaller ex part wheel #1/#3,#4,#5(usually use 3 horses underneath), and a tri Part wheel 1,2/1,2/3,4,5, I will cut the place wager in half and use that money to key the 3,4,5/1. If my main choice wins, good chance of exacta but if it runs 2nd, I may have a large exacta instead of a small place price. The Flaw is that if my runner wins and the place returns a nice price, I gave away half of what i normally would have collected on place and lost some on the pw key over the #1. I haven't really determined which is the better play.