Cuttin it off is definitely the faster way to go about it. I used to unwind everything. Big waste of time. That copper don't need to be in one piece. The yards don't care. I usually just use a hacksaw. No power tools here. Sometimes I save stuff to take to my grandpas and use the angle grinder if it too much of a hassle. You'll always find a better way. Just keep at it and get a system down.