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 Post subject: Modified Double Thumb
 Posted: Mon Feb 03, 2014 12:17 am Post Number: #1 Post
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I've seen a few posts referencing a modified double thumb and I'm curious for some feedback on how to adjust the DT layout for myself.

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Rev rate ~ 350
Speed 17.5 at foul line
Tilt 8*
Rotation ~ 55*
PAP 4 1/4 right x 1 up


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 Post subject: Re: Modified Double Thumb
 Posted: Mon Feb 03, 2014 9:35 pm Post Number: #2 Post
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mattypizon wrote:
I've seen a few posts referencing a modified double thumb and I'm curious for some feedback on how to adjust the DT layout for myself.

If you have high tilt & high rotation, I would definitely use the modified D.T. (helps control better)
with High tilt & low rotation, the D.T. works good.
With very low tilt, it depends on how close you track to the thumb-hole.


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 Post subject: Re: Modified Double Thumb
 Posted: Mon Feb 03, 2014 9:42 pm Post Number: #3 Post
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I'm low tilt and average rotation but I can get around it fairly well when I move in.

I find that symmetrical balls with VALs 40-55 are best for me on THS even though my recommended layouts are always 2:1 and 3:1 with lower VALs.

I've never tried DT layout but am loving the overall strength and motion of my Motiv Tribal drilled 60 x 4.25 x 40 p3. It's the closest thing I have to DT so I'm eager to try one for fun.

I have a Storm Freakin Frantic I'd like to drill Thursday but wanted to get some feedback before going with the standard DT layout.

Thoughts?

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Rev rate ~ 350
Speed 17.5 at foul line
Tilt 8*
Rotation ~ 55*
PAP 4 1/4 right x 1 up


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 Post subject: Re: Modified Double Thumb
 Posted: Mon Feb 03, 2014 9:44 pm Post Number: #4 Post
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mattypizon wrote:
I'm low tilt and average rotation but I can get around it fairly well when I move in.

I find that symmetrical balls with VALs 40-55 are best for me on THS even though my recommended layouts are always 2:1 and 3:1 with lower VALs.

I've never tried DT layout but am loving the overall strength and motion of my Motiv Tribal drilled 60 x 4.25 x 40 p3. It's the closest thing I have to DT so I'm eager to try one for fun.

I have a Storm Freakin Frantic I'd like to drill Thursday but wanted to get some feedback before going with the standard DT layout.

Thoughts?

I would try it personally. (but I like to try everything)


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 Post subject: Re: Modified Double Thumb
 Posted: Mon Feb 03, 2014 9:51 pm Post Number: #5 Post
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Me too!!! Thx.

Im currently awaiting a pin under versamax I bought used to try and Im also deciphering what to motion hole. I motion holed a raw hammer jacked and wasnt overly impressed.

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Rev rate ~ 350
Speed 17.5 at foul line
Tilt 8*
Rotation ~ 55*
PAP 4 1/4 right x 1 up


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 Post subject: Re: Modified Double Thumb
 Posted: Tue Feb 04, 2014 4:23 am Post Number: #6 Post
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What to Motion Hole ? I've heard the Radical Yeti responds well to that layout.

So, what IS the modified DT layout? I'm not seeing that response yet.
I just did a standard DT on a Columbia Outburst, and the starting 7/8 hole created a very strong reaction at the breakpoint, but I have to keep it close to the pocket.

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As of 5/1/2016
Right Handed
Speed: 18 mph (foul line)
Rev Rate: ~350 rpm
Tilt: 10*
Rotation: 55*
PAP: 5 1/8" right, 1/2" up
Brunswick Pro Lane, Brunswick Defy conditioner


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 Post subject: Re: Modified Double Thumb
 Posted: Tue Feb 04, 2014 6:51 am Post Number: #7 Post
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DarkHorse wrote:
What to Motion Hole ? I've heard the Radical Yeti responds well to that layout.

So, what IS the modified DT layout? I'm not seeing that response yet.
I just did a standard DT on a Columbia Outburst, and the starting 7/8 hole created a very strong reaction at the breakpoint, but I have to keep it close to the pocket.

This is what he is referring to
Quote from Mo:
"On players with that high a tilt, I put the PSA 1 1/2" right of the right edge of the thumb (for right handers) and figure out the drilling angle. The 4" pin to PAP distance and the 30* VAL angle don't change. This puts the balance hole into the PSA and decreases the drilling angle to compensate for the added tilt."


This quote might interest you also. I asked Mo why he used D.T. on some bowlers while using a slightly weaker Balance hole on others he also said:
"The P3 hole will make the difference as opposed to the "Double Thumb" balance hole location.

The key factor is your 70* of axis rotation in conjunction with 7* of tilt. We're getting into PDW territory. The P3 hole will help control possible overreaction and make the ball more controllable, but still very strong."


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 Post subject: Re: Modified Double Thumb
 Posted: Tue Feb 04, 2014 2:06 pm Post Number: #8 Post
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I resemble the "high rotation, high tilt" remark. Here is the layout I got from Megamav for a "modified double thumb" Defiant Soul (a stronger asym!): 37x4.5x30

I find that for a top-shelf asym the ball does not cover a ton of boards, but if I do my job it gets into a roll FOR SURE.

I love the thing, it's among my favorites right now.


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