I am going to poke my nose in here just because I feel I have a rather interesting perspective. Also this will be long and detailed because I am a manufacturing engineer and details are just what we do
In 2009 - 2010, I was playing quite a bit of pool (30-40 hours a week) and was playing what most people considered well, probably B+/A- level for those who use those grades on here.
Anyhow, I got into a relationship and bought a home and my table time was diminished, even though I now had my own table at home (funny how that works).
I was approached by a new to pool player to be a partner and I began to teach him what I knew... but I noticed I continued to hit a ceiling no matter how much table time I was getting.
I am going to make some references to an older thread, which can be seen here:
http://forums.azbilliards.com/showthread.php?t=300448&nojs=1#goto_share
So I began reading the instructor threads and several people were posting their videos for critique. I followed, and you can see what happened in that thread.
So I became an instructor and have provided this service to about 60 players in the past 4-5 years.
I was so busy working with other players and my teammates that I never sat down and did a solid month of dedicated training to truly nail my fundamentals.
I would go through periods of able to play just a few hours a week and up to 20+ hours a week,
and my fundamentals would be better than when I first took my certification lesson but not where i knew they should have been.
In February of 2016 I played an extended match against another player who was very near my ability level, just to get a litmus test of where I was at.
I lost the match but I had a close friend take careful notes of what they saw. This was going to be my base-point for my focused effort to improve my fundamentals.
I took a week to evaluate my stroke report card and customized a training session that I would follow for the week that would take about 25 minutes,
of which the first 5 minutes was a free play warm up and stretch period. I had 5 drills that I used during this time, provided to me during my certification lesson.
Primary focus was developing a solid mantra, controlling the cue with a repeatable stroke, an eye pattern drill along with an alignment and speed drill.
These drills were not all performed every day, and after the first week I decided my mantra needed some adjustment and that my fairly generic mantra was preventing
the subconscious transition of my fundamentals. I typed my notes and decided it was time to really zero into my mantra to get my body motions in tune with my natural timing.
I spent two weeks analyzing my motions, using a metronome to determine my timing and generate a rhythm.
I documented it, this all still part of the 20 minutes of training along with 5 minutes of free play. At the end of the second week I had a mantra that was all encompassing and rock solid.
Then 3 weeks later I ruptured my distal tendon and had surgery to reconnect, that resulted in several months of not playing.
During this time we were bringing in a BCA pool league so my focus again wasn't on my game.
However once the league launch had stabilized this spring, and a work project finished up a couple weeks ago I was able to start playing again this past week to prepare for
a high quality local tournament this past weekend (I got 13th - 16th after two months inactive play, after 2 days practice) and the upcoming BCA nationals.
The work I did last spring allowed for a quick return to form because I identified all my weak fundamentals and properly addressed them.
Sorry for such a long story but its all very honest. I will say, 20 minutes twice a day isn't enough to address confidence - which is why GOOD players have to play a lot,
even with strong fundamentals confidence can be fragile with little table time. 20 minutes twice is day absolutely will allow permanent changes to our fundamentals.
I have been putting off posting an updated video but I will do so after the upcoming trip to Las Vegas.
I can't wait to see everyone there!