A pitch too High!

However, I did exactly that and was getting distortion. So I found that by adjusting the anti skate so that the needle stayed in the center of the laser disc and without drift, that this gave me distortion free results. Do not set your anti skate this way until you've tried doing it as described above.

@terrible You can see that depending on the arm you might get different results. A person that I know that makes the Triplanar arm once told me that there really isn't a standard for anti-skate settings. So what works fine for one arm may not for another. So don't regard this comment is contradiction so much as the point that you might have to goof off with this setting to see what works best for you.

There is no standard for anti-skate because of how it works. Skating forces are generated by drag on a overhung stylus. This is why tangential tracking arms have no side bias. Since they are tangential the only force is in line with the arm and there is zero skating force generated.

Pivoted arms all generate skating forces because of the overhang. The amount of skating force varies constantly depending on how heavily modulated the groove is, how high the tracking force is, and how gracefully the cartridge traces the groove. The Soundmith Strain Gauge for example is famously low moving mass, low wear and a superb tracker. Sure enough I had to reduce anti-skate a lot when going from Koetsu to SG. 

Checking on a blank record is a pretty good starting point. Probably good enough to be one and done. But no one setting is ever perfect all the way across a record. All we can do is play listen adjust, play listen adjust. It is like setting sub levels, after a while you figure out what is a good all-around and then you are done.

I have these same test records. Probably the same tracks are on them. Don't know. Never bothered. Play music. Works just fine.

@mijostyn I just got Joni Mitchell - Live at Carnegie Hall, there is a blank side on the third record. I'll use that. Just reconfirming, since so many things are being said, do I put down the stylus on a rotating blank record at the centre or at the assumed run-out area? And then watch it drift slowly towards the spindle?

For the laserdisc method, I found a video of an Indian guy, he used a CD. Though I don't have a blank disk, can I use one like this?: 

Yes! Exactly but in your video the arm is drifting too fast towards the spindle so you want to add more antiskate. I also must add that your turntable must be level, exactly level. 

@mijostyn I have centred as much as I could. Please look at the pic below and let me know if there's an issue with TT balance:

I have also done a test on a blank record:

And this is what Joni Mitchell sounds like currently on my system:

There is a divot in that blank record. See how the arm goes back and forth? Put the arm in closer to the run out area. It should slide only in one direction. Did you add any more antiskate before this video?