Keep it simple. Small groups, Less than 10, just clip to a line. I have loops tied in. Paracord is great. My long line
, 200', has evenly spaced loops. The blocks that hook to that have a 30" dropper that stay on the decoy with a quick clip. Hook on as you roll it out. Keep your blocks tight to avoid lots of swinging tangles. If you get a lot of wigeon coming in, look at using the clear tanglefree? stuff. It really does keep them from spooking.