Easist way I have found to set most cord operated drop away is to serve the string a few times around but not so much or so tight that the cord will not pull through the serving. Draw the bow back and you will see the cord pull up the rest then pull itself through the serving. Let it down and serve it in the rest of the way very tight. Now put a big glob of wax on the cable under the tag end of the cord right up next to the serving. Cut the cord and melt the end so it won't pull through. The wax is to protect the cable from the fire.

Now your rest should come up about the last few inches of draw and drop long before the fletching gets to the rest.

I also do not split the bows cable and put the cord through the middle. I have found that with the cord through the cable it tends to wear out the cable faster in that spot. The cord is fairly rough and rubs the inside of the bows cable.