There is a companion video that was posted with the Track Presents Cores 101 video
Alias - An In-Depth Look at the Engineering and Principles Behind Track's Latest
Apparently the youtube comments on these videos have been deleted.
Take this for what you will, But here is one comment posted with this video that I happened to save that commented on why would you use the sym. layout on the alias:
Youtube comment by Jeff Piroozshad:
Track - thank you for this and the Cores video. They were very helpful in understanding these effects in more detail.
I do have one question regarding the Symmetric layout. Originally, I thought "why wouldn't you just drill a symmetric ball like a GB3 or a Fierce Phobia instead of jumping through the hoops to drill an Alias with the symmetric layout?"
I then remembered after watching the Cores 101 video it's because a symmetric ball will always be asymmetric after drilling, whereas the Alias will always be symmetric after drilling.I was hoping you might be able to put up a video of the ball reaction difference between a symmetric Alias and a ball that's symmetric pre-drilling to illustrate the difference and show why a bowler should drill a symmetric Alias rather than a pre-drilling symmetric ball. Thank you.
This seems to address why also:
Tech Talk: Symmetrical Alias Layouts