I believe the rules prohibit the use of any external aiming device. Pretty sure something like that would be considered an aiming tool.
Last year I saw one of the women on TV (I forget who) put one bridge on top of another to get added height over a ball.
How would it be considered an aiming tool? It is making it so that someone with short fingers can reach a shot that someone with long fingers can reach? The same as a short person using a bridge.
I have smaller than average hands as well. Just practice. I can't imagine Alex, Dennis O., or Parica having very large hands, and they seem to do just fine![]()