The lockwashers are for the lock down screws on each pin. I used the loktite on the adjustment screws. However, the locktight doesn't seem to last too long since it never makes it to the threads.

If you can tighten the screws down enough that they don't work loose without breaking them don't worry about the lock washers. If the screws start to work loose consider the washers.

Here's a picture of sight. The black arrow is the screws that I add the lock washers too. The green is where I put the locktight that doesn't seem to hold anyway.