I'm assuming you're talking a head with rollers and a door that'll open and close to lock the wire in. At FPL they are hung up on using a "Shepard's Hook". Using a Shepard Hook it is no problem to use a gut moving wire. Some companies are hung up an Open Hook policy.Maybe you can talk them into that method. Just an alternative procedure you can recomend.You have to be more careful on your intial setup though as the hook is more fixed as the head you are describing ,even more so on angles.