I wondered if they offered that rest with prongs too. But for your purposes, it doesn't make any difference. Even with the prongs instead of the lizard tongue, it's still a dedicated release rest. You really, REALLY need a rest designed for fingers shooting. Another decent rest that won't force you to take out a mortgage to get one is the NAP Centerest Flipper. And the centershot will also have to be adjusted differently for shooting fingers. Rather than having the arrow perfectly centered with the string, like I'm sure they did when they tuned the bow for that rest, the centershot will need to adjusted out a bit, so that when you eyeball the string centered in the track of the cams, you can see the tip of the arrow riding outside the string. Like it shows in this illustration:



Just how far the arrow will need to be set outboard will depend on arrow spine and how clean your release is.

Just curious... When you bought that setup, did you tell the guy at the shop you intended to shoot fingers?