Markpao,
The answer to your question is "yes".
Washers between the headshell and screw heads provide several benefits:
1. they reduce damage to the headshell from the spinning screw heads;
2. they stop the screws digging into the headshell and moving your setup, as you suggested;
3. they spread the load over a wider area, which provides a more stable connection.
Nylon washers work okay but they can muddy the sound a bit. Metal washers work better and sound cleaner/tighter.
You spent $100 on a protractor to optimize results. It'd be silly to take shortcuts on the installation - sorry.
The answer to your question is "yes".
Washers between the headshell and screw heads provide several benefits:
1. they reduce damage to the headshell from the spinning screw heads;
2. they stop the screws digging into the headshell and moving your setup, as you suggested;
3. they spread the load over a wider area, which provides a more stable connection.
Nylon washers work okay but they can muddy the sound a bit. Metal washers work better and sound cleaner/tighter.
You spent $100 on a protractor to optimize results. It'd be silly to take shortcuts on the installation - sorry.