I don't use any crimp beads or anything on mine. I buy the nylon strips that are used for necklaces, thread through the washer until the washer is in the center of the nylon then put my hand/arm through both of the loops that are created on either side of the washer. The nylon will then go to either side of the washer just like the picture that was posted on this initial thread. HTH and makes sense. It is truely very simple as I struggled with this as well until I was playing around one day and did it. lol.
I get my magnets from this etsy seller. They are the strongest magnets I have found thus far and for the best price. http://www.etsy.com/shop/SunAndMoonCraftKits