It is all in the tillering of the bow. If a bow is tillered for three under it's useless to try split finger. When I purchase a bow I have them ship it unfinished (some will not send them this way, which means I have to sand the finish and the limbs[:@]).
I have many bows that shoot perfect for me and many have different tillers. I get a bow, shoot it and sand the limbs until the tiller gets to whatI need. Somewhere between 1/8" to 5/16" shooting the same style.

The tiller has to match the shooting style in order to shoot well.