displaying pap on bowling balls

Question
I'd like to see the pap on my bowling ball so I can tell as the ball travels down the lane that I'm properly releasing the ball & getting proper rotation.  Can the pap be shown as a permanent marking, i.e., drilling a white or yellow dot on a bowling ball, or it that illegal?

Thanks for your response!

Answer
GW,
I've actually done that before. Find your PAP. Get the point drilled out and plugged with a contrasting color from your local bowling shop.

Using the ball when practicing or even during competition, will give you instant feed back about how you are rolling the ball.

Thanks for the question.