I have never tried single hooks on crank baits, but it sound interesting. I take the treble hooks off spoons and replace them with a large single, very effective. What I have done to crank baits is remove the front trebles completely and leave just a rear treble or the center and rear treble. Same amount of solid hook ups and less snags and lost lures, plus easier hook removal from the fish. I did catch a front treble from a large Rapala in the center of the index finger while the back treble was in the lip of a large northern pike, what a painful bloody mess.
Cheese