I got my AMB particle drilled. Went to somebody different than normal. He recommended going to a shorter span which i think is good.. but he also recommended going from 5/8 to 3/8 reverse in my thumb.. and taking out the 1/8 right and goin to 0. Ball feels fine as far as span but I can't get out of the ball. My span is 15/16 and 5 inches to the drill holes.. so I guess it is another 1/8 or 1/4 with the inserts.. I have a fairly long thumb. Do I need that reverse? Also going with the coke bottle test I need 1/8 right. I feel like i need tons of bevel to allow me to get out clean.
He was going to drill my kinetic but the way he was laying it out I told him to stop cause it looked completely wrong for what i wanted.. I wanted skid flip and he was putting the mass bias on the left side of the thumb. I made up an excuse for him to wait on drilling that ball and gave him the particle since I already had layed it out myself. I should have just said no thankyou and left.. but I can't do that for some reason..

You are probably squeezing the thumb, but if your span is almost 6" long, so you are going to need more reverse pitch than most. With a span that size you could do the coke bottle test with a football

It is never a good idea to put the mb on the left side of the thumb unless you have a very low Track, or an extremely high rev rate. You don't want the mb closer than 2" to the Track, because the ball will hit the break point and back off. This works well if you are trying to play straight up the boards like Walter Ray, but have too high of a rev rate to play this type of line normally.

My span is right at 5" and I have 3/8 reverse. If you are around 6", then I would say he should have left you at 5/8.

I must have mistyped somewhere. my span isn't 6.. it is around 5 1/8 to the middle and 5 1/4 to the ring. I forgot the 4 on the 15/16 on my other post.. sorry. M
My thumb is just shy of 3 inches long.
exactly about the mass bias... that is why I told him to not drill the ball and ruin it.

That's sounds better. You should be perfect with the 3/8 reverse. Stop trying to hold on with your thumb. It can take a little getting used to. I "arc" my thumb. It helps a lot.

If I were you, I would talk to him about how you want to map it. Then, map it with him.

I don't think I am grabbing or squeezing at all. I have only tossed it for a couple games so far in practice. I will mess with it some more to see if it is my release that is making it hang. I'm already talking to another driller though. I went in to let him know what my situation was and we ended up talking about bowling balls, layouts, technology and everything for about 3 hours. He is a younger guy but seems very knowledgable and very up to date on technology and techniques. I'm going there today to have him drill up my Track kinetic. I liked his methods and thinking about things and his eagerness to spread his knowledge.

Im taking a closer look at my ball. I would say the pitch would be fine if my span was a little shorter .. so that my thumb could come straighter up out of the hole.. right now my thumb pulls slightly forward when I come out and that is catching my thumb as it is coming out. The driller used the 1st crease in splitting the finger hole technique. The new guy I am talking to uses the halfway between the 1st and 2nd crease mark like coach jim recommends. He also uses reverse pitches in the fingers. I am seeing how pitches do change the feel of the ball though.. going to a shorter span but going with the 3/8 reverse instead of 5/8 still makes the ball feel pretty long.. almost as long as my stretched span ball.

I got my Track kinetic drilled up .. I haven't had a chance to throw it but I am pretty happy with the layout.. 53 x 4 1/8 x 26 is what it ended up being. This ball span was refit using the midpoint between the two crease method. I have to say that the ball seems to fit very well.. nice and relaxed.. I don't feel any pull on my hand or fingers. It looks short and I keep thinking it is short just by the look of my hand.. but I don't really feel that it is short.. which I thought it would since this ball is 3/16 shorter than the amb particle I had drilled on Monday.. and around 3/8 shorter than my longest span ball that I was using regularly. Hopefully it will pay off when I throw it.
Only problem is that I have 8 balls to change the thumb on.

He probably doesn't know how to put a weight hole in the ball. I have seen many a shop drill everything label so they don't have to put a weight hole in the ball. That is fine if the ball is symmetrical, but asymmetrical balls pretty much always need a weight hole unless you get a pro cg with the cg kicked toward the center of the grip from the line from the pin to mass bias.

Try it out for a little while. If you like the fit, best thing to do is to take them all into your driller at the same time and get them done. I know, it's expensive. But, if your driller has them all there and does them at the same time, it will be easier for him to get them all the same. In April, I had 4 balls redrilled to a different span, different pitches, and no finger grips. Why? So he could exactly match everything up at the same time. I got a Cell a few weeks ago. After about a week, I had to get my thumb sanded cause they were all tight. I brought all 5 in at the same time. My driller thanked me. He said that it is easier to match equipment up when you are doing them at the same time rather than one at a time.

Getting 8 done at once will take some time. Make sure that you have a few days until you have to bowl again. Also, let your driller know what you are planning to do. That way, he can schedule it with you.