Recently I bought a fully plugged AMF Heist Pearl for $25 shipped (from iamone78 here -- thanks for a heckuva deal!). As you can see from the pic, the span before plugging was close to mine and the layout was similar to what's required for a bowler with my PAP on the MOtion hole. I've been curious about this layout and figured this ball was a perfect guinea pig.

Per instructions, my driller marked the spot with tape and I threw the ball down the lane while he watched. Sure enough I was tracking over the spot. So he took the ball away, moved the hole slightly, and brought it back drilled.

I wish I had a video to demonstrate the difference. The Heist Pearl was a very limited edition ball - actually the Heists were the first balls produced out of 900G's San Antonio plant - and it was known for it's low RG core but super smooth weaker cover. This lent itself to a very predictable reaction across all lane conditions, even for a Pearl. This is always how I imagined the Seismic Aftermath Pearl to be.

Anyway, before the MOhole I was playing the same line as my Brunswick Ringer, currently one of my favorite balls. The ball motion was very similar - the classic Brunswick roll. After the hole, I was forced to move 2 boards left of the Ringer and had a good 5 more boards of recovery to the right if I threw it out. As the lanes opened up I ended up 4 boards left. When the ball hit friction you could see the revs, but with that weaker cover it didn't jump. The continuity through the pin deck was impressive. And it was carrying the corners better than before the hole. Frankly, after the MOhole it was reminding me more of my Brunswick Aura than my Ringer. I'll have to compare them next time. But the MOhole unleashed the backend on this ball.

I can't imagine what this would be like for me on a ball with similar core specs and a stronger cover. I'm sold!

I turned my Brunswick Combat Zone Tracer that has a diff of 0.023 into a hook monster using the Mo-Hole.

What version or weight of Combat Zone Tracer are you throwing? There is no way that the 14# CZT (http://www.123bowl.com/ball.cfm?ballid=583) that I drilled up 4 years ago had that little differential... I traded it because on house shots it forced me too deep from the very beginning.

FWIW...  The MOtion hole is a great layout for speed dominant bowlers like myself that are tired of lazy reactions downlane when the ball is pushed past or outside the break point.

I did a slightly weaker pin placement version of the layout on a Pursuit-S and changed the ball from "so-so" to "pry it out of my cold, dead hands"

The only ball I can remember looking this different going through the pins was either an AZO Little Boy or Apex.  The ones that had the goofy twin pin cores...

Old fashion weight holes are back!

I have had a couple of 9 inch from grip center weight holes, a 7 inch weighthole on my Sonic Boom and they have all done what they were supposed to do.

Lenghthen the time till the move and then increase it.  As the Gravity balance system from Lane#1 says, it raises top weight and increases backend.

Others would say it increases reaction for other reasons! 

Regards,

Luckylefty

Quote from: scubachris on August 09, 2013, 07:00:22 PM

I turned my Brunswick Combat Zone Tracer that has a diff of 0.023 into a hook monster using the Mo-Hole.

What version or weight of Combat Zone Tracer are you throwing? There is no way that the 14# CZT (http://www.123bowl.com/ball.cfm?ballid=583) that I drilled up 4 years ago had that little differential... I traded it because on house shots it forced me too deep from the very beginning.
..

There were several versions of the Combat Zone and Combat Zone Tracer (the pearl), just like there were of the Danger Zone. According to chart I got from a Brunswick rep back in 1997, the Combat Zone TE1 (PK 18 Pearl) and the TE2 (PowrSurge) purple pin both had a differential of .023".

Thanks Charlest! Nice to see a poster actually researching a answer before giving their opinion. Here's a link that shows this at-  https://www.facebook.com/groups/393886417326249/permalink/527757980605758/?comment_id=527758030605753&offset=0&total_comments=8

I did research it and rather than directly answering my question, you choose this response...

Hmm... My freight train has a layout that this would work on...

i would look at one of the freezes or vibes go under the exceed and 718

If I remember correctly, Mo Holes are 10" from the pin (rather than grip center) on symmetrical cores, although depending on the pin location and the direction you choose from the grip center, the hole locations may match up.  To Lucky's point, I believe they are doing all of the claimed (increasing top weight and increasing core dynamics).  The debate becomes which influences reaction (personally, I believe core dynamics trump static weights).  Regardless, I do believe there is a noticeable difference.

My experience is with a RG Wrecker.  I drilled it up initially w/out the hole and threw it from a couple weeks in league.  A good reaction, but nothing that stood out.  Put in the Mo hole and the ball acted completely different.  Didn't shoot under 650 for the last 6 weeks and ended with my high set of the year 770 (a couple stoned 9 pins away from a nice 800 set). 

From my limited experience and what I have read, the best results tend to be with simple symmetrical cores and weak/medium strength covers.

If anyone has other opinions/input, I would like to hear (I assume others following this post would like to hear as well).

Thank you,
Scott