Most accurate way to adjust for correct vta on vpi classic 1

What tools are you using to align this cartridge? Are you certain that overhang and tangency are correct? VTA is only one aspect of cartridge alignment and - arguably - not the most critical.

I use the lines on an index card to level the arm, do not tighten arm down and reach around to the side of the arm and turn the big knurled nut to raise or lower the arm while playing, he careful not to bump arm during this process and set the arm by ear, when your there tighten Allen screws and knurled nut. Enjoy.

to cleeds
I used what came with the table from vpi. To my eye, those alignments and overhangs are correct. Thank you for your reply.

Your ears are the best indicator of correctness......

I've had my Classic 1 for nearly 8 years.

Eyeball the cart level, call it a day.

Maybe bump it up/down if you can actually hear improvement...but what about that thinner used copy you picked up?

Use the best phono stage /cart you can afford, then you will hear what the fuss is all about.

You're going to drive yourself mad trying to figure out what's "right"