^^^^^^^^^^^^^^
Yep. That's what I've done & use occasionally.
My personal thoughts on the cue grip are that it should be along the lines of a single gimbal. The cue pivots freely when it is just touching at two points on either side of the cue. Ideally, these points would be on the inside of the thumb and the index finger. Dennis Orcullo holds his cue this way, with the other three fingers held slightly out to the side the way Bergman holds his back two fingers.
Basically, he makes a circle with his thumb and index finger and cradles the cue inside that circle. Both SVB and JA commented on a TAR podcast that Dennis hits the ball better than anyone in the game today. I've played around with this grip, and I like it a lot. Just feels awkward because I'm not used to holding my other three fingers away from the cue, so I haven't tried to make it my own... yet.