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!

IMO the effect is not due to statics.  I put a motion hole in a nomad Dagger.  The reaction was awesome, but the ball was statically out of balance.  I loved the reaction but had to make it statically legal in order to throw it in competition.  Drilling the fingers deeper solved the static weight issue.  But making it statically legal did not kill the enhanced reaction.  Thus, I would attribute the better reaction to something other than static weight.

BTW, I have motion holed a Fire Road, Nomad Dagger, Meanstreak, Virtual Gravity and a Mission 2. 

I have had very good results with the  Fire Road and Nomad Dagger.  Slightly improved reaction from the VG and Mission 2.  And the Motion Hole turned the Meanstreak into a complete dud. 

Juggernaut,

Back in the 80's, most everything was a pancake weight block, so those changes made a difference. Now, with the major internal influence dwarfing the static weights, it's the weight hole. As we all know, any time you put any hole in a ball, you're changing the shape of what is in there. But, with another hole, after you have already become accustomed to how that ball rolls, changing the dynamics of the weight block again, an ounce isn't going to make much difference. The shape of the thing inside matters, not 1 OZ out of 15#

I just had a blue /blue Hook drilled with a MOHole and only got to throw it a few frames,  just to try and get the hole drilled to the right size.  Not sure if it's quite right yet but right now is about 1".   My friend who layed out the ball said to just go 1 and 1/4", but the driller is doing it in increments. Still in the adjustment phase but so far I really like this drilling. 
Gonna use it in league tonight so hopefully I have something good to report. 

Ok, I used it last night and did alright with it on the first game, sport shot, old wood, very old wood.  Shot changes very quickly, and I either changed too fast or not fast enough.  I really like the way the ball hit, very hard and very continuous. 
My MOhole is a little on the small side, maybe 1 inch.  My friend says to just max out the hole (1 1/4") but the driller says othewise.  My question is this, do you guys that have the MOhole, do the hole in incriments or just max out?  Going bigger makes it react more or less on the backend?

Quote from: Artimust on August 12, 2013, 01:40:10 PM

I just had a blue /blue Hook drilled with a MOHole and only got to throw it a few frames,  just to try and get the hole drilled to the right size.  Not sure if it's quite right yet but right now is about 1".   My friend who layed out the ball said to just go 1 and 1/4", but the driller is doing it in increments. Still in the adjustment phase but so far I really like this drilling. 
Gonna use it in league tonight so hopefully I have something good to report. 

Ok, I used it last night and did alright with it on the first game, sport shot, old wood, very old wood.  Shot changes very quickly, and I either changed too fast or not fast enough.  I really like the way the ball hit, very hard and very continuous. 
My MOhole is a little on the small side, maybe 1 inch.  My friend says to just max out the hole (1 1/4") but the driller says othewise.  My question is this, do you guys that have the MOhole, do the hole in incriments or just max out?  Going bigger makes it react more or less on the backend?

I have drilled four balls with the MOtion hole:  A C300 Freeze, Track 607A SE, Brunswick Meanstreak Brawler, and Morich Locomotion.  On all of them, I started with a 3/4" or 7/8" weight hole.  I have stepped them up in 1/8" increments until I get the desired backend motion.  As Impending Doom stated, the backend increases with the size of the weight hole.  I've maxed out the hole size (1-1/4") on only the Track 607A SE.  I had the 607A SE in the past, and did not match up with it.  It is a completely different (better) reaction for me with the MOtion hole.

I've had over a dozen balls drilled with the MoHole. Seems older sym balls benefit the most. When added to a newer sym ball the reaction isn't as strong or noticeable as the older balls. My Wildcard and Tracer are now my strongest balls in terms of angle entry and out-performs the SYNC, Wrecker, Lights-Out, everything that i currently own (+200 balls).

I was curious as well. I have a columbia 300 sharp noize I was debating adding a motion hole to. Would I need to plug and start from scratch or is a pin over bridge with a 2 inch pin appropriate? Also will it make this perl go too long and leave no time for recovery?

this sounds great, but with the equipment available on the market, why would you not just get a ball designed for the backend you seek?

They don't really design balls that do this for low tilt, speed dominant bowlers...  This layout gives those bowlers something they couldn't create before.