Spacer between cartridge and headshell on Breuer

I had the same issue when my new Graham Phantom II arrived in June. I fitted it to my TW Raven One but could not get the back of the arm parallel to the platter using my Transfiguration Orpheus cartridge. I spoke to Graham Tricker, the UK importer of the Raven and he advised me that TW had engineered a new stainless armboard base which was 3mm lower in height. He exchanged one for the original armboard base (not the black bronze armboard itself with the stainells collar) and now I can get the arm level to the platter without running out of travel at the arm pillar. No messing around with headshell spacers or copper mats!

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!

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!