I am a glove shooter, and want to move to tab. I bought a split finger tab, but now I also want to learn 3-under shooting. I notice there are 3-under tabs. Do I REALLY need a 3-under tab? What issues will I face, if any, if I use a split finger tab for both split finger and 3-under shooting? FYI - I have both an upper and lower knock, made of serving material.