TWICE-PLUS-TENTHS … The Most Useful Bank Shot Diamond System You’ll Ever Learn

I've been working with this and WOW! I'm suddenly a real threat to drain long banks that used to be pretty low percentage. Thank you, Dr Dave! They are turning into legitimate options instead of my only option.
 
I've been working with this and WOW! I'm suddenly a real threat to drain long banks that used to be pretty low percentage. Thank you, Dr Dave! They are turning into legitimate options instead of my only option.

I’m glad to hear it. You’re welcome.
 
I’m glad to hear it. You’re welcome.

Dr. Dave, this system works great on my table as well, especially for long banks. The only disadvantage from my perspective is I can’t use the same spot on the wall down the table for the same pocket (I can find the spot for the 3 and 6.6 line for example and use that well for a nearby OB, but not for an OB farther away from that line).

I have not bothered to think through the math, but I would expect there would some sort of equivalent adjustment one could make to the banking rail aim spot using a fixed spot on the wall for all banks to the same pocket—eg, move the corresponding banking rail aim spot a certain smidge for each diamond down table. But I don’t think that smidge would work out in nice tenth increments.
 
Dr. Dave, this system works great on my table as well, especially for long banks.

What brand tables have you guys tested on?


The only disadvantage from my perspective is I can’t use the same spot on the wall down the table for the same pocket (I can find the spot for the 3 and 6.6 line for example and use that well for a nearby OB, but not for an OB farther away from that line).

I have not bothered to think through the math, but I would expect there would some sort of equivalent adjustment one could make to the banking rail aim spot using a fixed spot on the wall for all banks to the same pocket—eg, move the corresponding banking rail aim spot a certain smidge for each diamond down table. But I don’t think that smidge would work out in nice tenth increments.

Unfortunately, things do "break down" for very large angle "long banks." I switch over to the 8-10-12 system for those:


This is no single "spot on the wall" (or simple system) that works over an extremely wide range of angles.
 
Sometimes things worth doing take work.
Many things in pool are tough, but they are worth doing.
(Dr Dave’s quotes of the day 🤓)
Some people like "feel" my brain isn't wired that way, so I like to have a system for everything! Thank you for all the great information you have made available .
It takes all kinds to make the world go round.
 
Some people like "feel"

Agreed. Systems are not for everybody. And if you play and practice smartly over many years, you can develop solid-enough intuition and memory to aim banks accurately and consistently with “feel” alone.


I like to have a system for everything

Me too. An effective and practiced system gives me confidence with no need to depend on judgement or feel, which can sometimes result in “second guessing.” Almost every time I change my aim based on feel, not trusting what a system has told me, the results are bad.


Thank you for all the great information you have made available.

You’re welcome.
 
I watched the video, it looks like you took a lot of time to get the math figured out correctly. it all probably is spot on in terms of the math, but I recall a sentence in the video early on, "if your calculation at the table is off by a hair- it does not work."

This is the reason that I rely much more on experience and feel for banks / kicks- yes I will use the " half distance " diamond method on parallel kick shots and some banks - so your method makes sense for someone desiring to adopt a mathematical approach to banks/kicks - good job on that- just not for me- I have enough to think about in terms of PSR, alignment, grip, stance, stroke. I am one who is just trying to avoid too much in my head as I approach each shot- I'll put math equations aside for now, until I feel that all the rest is perfect for each and every shot approach- probably never:)

Your stuff is very good- I have my own approach to aiming any shot- straight, cut, or bank - I'll leave it at that, as an experienced player.
Analyzation Paralyzation!

When I come across info like this that I think will help me, I try it out, give it some practice time on it's own. Then, I just let it simmer in my cerebellum. Next thing you know a situation comes up and you at least have an idea of how to possibly pull it off without 'tiny little hairs on the back of your neck' directing you.

I've watched the video a couple of times but I won't get a chance to try the system out for another day. Family stuff. But I'm looking forward to adding it to my 'kit'. Again, Thanks Dr. Dave.
 
I've watched the video a couple of times but I won't get a chance to try the system out for another day.

Please let us know how it goes on your table (and let us know the brand).

I have been testing various tables and it has done well on all so far except the Diamond tables to which I have access (where the banks come up noticeable shorter). All kick/bank systems require adjustment on typical Diamond tables. I still use the standard systems when playing on a Diamond table. I just learn to adjust relative to the systems.


I'm looking forward to adding it to my 'kit'.

I've already added it to my "toolbox," and it is one of the best new "tools" I've added in a long time.


Again, Thanks Dr. Dave.

You're welcome.
 
FYI, I just posted a new video that presents a new diamond system for aiming sliding bank shots. It is called the twice-plus-tenths system. It is more accurate than all the other systems, including the 1/3-more-than-twice system, and it works over a wider range of angles. It measures everything relative to the rail grooves across from the diamonds instead of through the diamonds. The origination rail number is always twice the banking rail number plus that many tenths. Speed, spin, and cut angle effects are also demonstrated, along with how to aim cross-side and long banks in addition to cross-corner banks. Check it out:


Content:
0:00 - Intro
1:20 - Twice-Plus-Tenths System
4:29 - Factors and Effects
7:44 - How to Use the System
10:40 - Cross-Side and Straight-Back Banks
12:05 - Examples
13:29 - Wrap Up

As always, I look forward to your feedback, comments, questions, complaints, and requests.

Enjoy!

FYI, I just got done testing a range of table brands and sizes. For those interested, all the results can be found here:


The 9' Olhaussen and 7' Valley bar box were the closest to being "on system." The 9' Gold Crown banked just a little short due to humid and old-cloth conditions, especially at medium bank angles. The Diamond tables (9' Red Label and 7' bar box) banked very short, especially at larger bank angles. The 7' Diamond bar-box banked almost a diamond shorter than the other tables and the system prediction! It was shocking to observe.
 
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