Is your index finger slight apart from middle on both forehand and backhand grips?
I've always played tennis with all four fingers closed (almost) together. I use a semi western FH and eastern single handed BH. I just realized recently upon watching some slow motion pro videos that lots of them have their index finger slight apart from the middle finger. I went on the court and tried to hit some balls like that and of course, it kind of felt weird when you had the old grip since forever, but at the same time it *seemed" to me that on the backhand side this slight distance of index finger *somewhat* helped stablize the racquet a bit through contact. I'm just curious how you people handle your index finger on your grips and if it makes sense to try to modify my grip over this detail.