I actually use the Curry change as the very first sleight in my ambitious card routine. I spread the cards out face-up, ask someone to name one, slide the selection out, and gather the remaining deck in the left hand, prepping for the sleight.
I comment on the selection and ask the spectator if that card has any special significance for her. The eye contact during this exchange provides sufficient misdirection as I execute the sleight. I immediately spread the deck (with the chosen card at its face) face down and slide the "chosen" (actually indifferent) card into the middle of the spread. And proceed from there.
I know that this violates the cardinal rule of the turnover change -- to have something else important going on in the right hand to justify turning the card with the left. Still, I've never been challenged on the move. In part, that's because this is the very first sleight at the very opening of my card work. People know I'm going to do card magic but don't yet have a sense that I'll be wowing them with sleight-of-hand. If the Ambitious Card came later in my sequence of routines, I probably wouldn't open with such a barefaced execution of Curry's move.
Also, I'm an amateur performing card magic in informal settings. If I were a pro with a reputation for card dexterity, they'd be burning my hands from the start, and I'd leave the turnover change out or give it more cover.