Poly is a bit harder to string on a drop weight in general because the string is so stiff there is less room for error in allowing the proper amount of slack in the string when you wrap the string around the drum and start the pull. The Klippermate exaserbates this issue because when you want to adjust the slack you have to release the string from the cam gripper. You don't have a clutch to allow you to release the arm independent of the drum so that you can give more or less slack without releasing the string. Most Klippermate users say that they get used to this after a while and it is no big deal, but it is harder for beginners, no question, I've done it. Some users have also complained about the Klippermate's gripper kinking poly strings.