Thank you, Joey.
Yes, I'm a Mechanical Engineer, and to the best of my memory, I was the first Mechanical Engineer to describe on these internet boards the transverse wave concept in reference to the amount of mass in effect of the collision due to the offset hit 15 years ago. I had in depth discussions with the late Royce Bunnell on this idea, and though it took some explaining, he most certainly understood it enough to be able to describe it himself on these boards. Almost word-for-word. Believe me when I say how much that makes me happy.
I also did a year and half study with the 314 shaft as my primary shaft, which I posted some 15+ years ago on RSB.
I own over 20 LD shafts.
I've lived in New England, Florida, and California and go to most major tournament in the US. I don't base my opinion on one or two local pool halls.
One would be hard pressed to find someone that has significantly more observation on LD shafts as I over the years, scientifically and empirically.
What I said then is no different than today: LD shaft helps a lot of players, but those that are already used to hitting both sides of the ball with whatever method they have, the advantage of LD isn't so significant, and that there could easily be disadvantages. All of those disadvantages can be seen on Dr. Dave's LD advantages/disadvantages links.
After my year and half of using a 314 (and yes, I was winning tournaments all over New England, also documented, but that really doesn't matter), I switched back to a normal shaft (my new-at-the-time Andy Gilbert), and the world was right. I didn't have any reduction of spin, no reduction of shotmaking with english when returning to a normal shaft. What I did gain by going back to a normal shaft was better, more understandable speed control when using english, and much more accuracy and repeatability when shooting slow, spin shots (higher effective swerve, lower effective squirt).
Nothing has changed over the years, as I've tested and owned most LD shafts available. And those that know me know I'm going to try them out, even if it won't be a fit. I think I know why "New to LD" players like them, but I also know why players like me don't find LD shafts to be an advantage.
That's my story retold, and nothing is different. This topic is brought up every two months. Nothing is different.
For those that love LD shafts, great. I'm happy. But, please refrain from telling me that I need to investigate more, have poor observation skills, shoot with less english

, and need to get my head out of the sand.
Thanks.