Spacer between cartridge and headshell on Breuer

Hi Musiclovers!
Finally, I think I´m close to sweet spot with my AirTight PC-1 cartridge using Mint Protractor.
Quote (with it´s wright)- It wasn´t easy but definitely worth it.
Using a mirror with thin tracking line and zero reference points on it makes it look easy at first sight.
But to be able to make precise adjustment Yip has added several photos in instruction manual to guidance.
These photos are a necessity, we are talking about parts of millimetre to get close to sweet spot.
It demands some patience and a lot of readjust/listen, readjust/listen, readjust/listen ...........until reached.
Yip has thought about all that and also about some frustration of not getting it perfect first time.
Manual is complete, well done Mr Yip!
BTW, PC-1 sits on a Breuer 8C.

Does anyone know what adjustment screw on side of tonearm is used for (below screw for antiskating).

Many Thanks!

Hi Kipdent/Drjoe!
Thanks for your advice.
In spite of lowering the arm as much as I could I could not get it parallel. End of tonearm (towards armboard) was slightly higher. There is adjustment screw for VTA wich I freed from touching armbase. The armboard is original from TW Acustic with steel insert for Breuer.
What about the black spacer coming along with tonearm, do you know if it´s standard. Or is it specifically asked for when ordering Breuer.
I definitely don´t want this arrangement, prefer without any spacer.
If any of you have experience with PC-1/Breuer I´d be happy
to know.

Many Thanks!

Hi Pcosta!
You´re an angel, got the message right on spot.
Getting thinner spacer on armboard for Raven One will solve the problem.
Dealer told Thomas to send one.
I wish it was the armboard with VTA on the fly but it cost more than 1000 euro (smart and quick testing different carts).
I´m also waiting for my Mint Protractor.
BTW, instruktions for Breuer was printed on bottom half of a single sheet of paper and no protractor. Not much considering price.
What about antiskating, is there any at all.

Many thanks for taking your time, and the rest of you!

Thanks Drjoe!
I might have to change antiskating later.
I thougt the nob on top together with the other on side were for adjusting ruby bearings, and shouldn´t be touched once set at factory.

Ducatirider!
About the copper mat I think it will be too thick, I´m using clamp+mat.

Today my new armboard/spacer should arrive and Mint Protractor should arrive next week.
Looking forward, I will notify the outcome.
Tanks everybody!