So, I aligned my Cartridge by myself for the first time and.....
I used a mirror protractor, a mini screw driver and used the cartridge as an alignment indicator, rather than the head-shell.
The result is that the square end of the Cartridge is not aligned to the Square end of the head-shell when looked at from above, but perfectly aligns with the straight line that is imprinted across the mirror protractor the entire direction of the tool.
I assume this is okay and that there is no specific rule regarding the squares of the cart and the head-shell having to be perfectly lined up?
Read responses in audiokarma.org