Unless you are exceptionally tall, you probably don't need a three board. Personally if i were not using a shirt i would not use any boards, but that is me. I have seen a few guys on the message boards wonder why thier raw bench plummeted when they started westside, boards is the main reason. If you want to use boards you could use a two boards as second exercise on DE day, that is probably how i would work them in if i had to.