Supposed to have 4 I think. My old girl has only two now as well since one hole is ripped out thanks to previous tenant. I am thinking about replacing the disc and putting her back to four although it does a perfectly fine job with just the two. I had to make a cutter brake for it since it didn't have one but would love to see a photo of what an original one is supposed to look like if there is any chance yours has one and you could take a photo and post it for me.
