Just wondering, when doing the IT system, where are the pitches added? to the pilot hole, or thumb it, or both?

I have 1/8 forward and left (righty) in my pitches and a friend gave me his ball and it has 5/8 reverse and a right pitch... I placed my thumb it into his ball and it locked securely and was easily removed. not tight nor loose. but I don't want to risk it.

Pitch is drilled into the pilot hole.  Your inner will fit into his ball but the top of your slug won't be flush with the ball all the way around the hole.

Thanks Sir... btw, you still in VA?

oh... stay away from east St. Louis lol... you have/had a grand place in VA.

Btw, what issue can occur with a short span...