My CLE wears a leicagoodies.com sling as do all my RFs. I'm addicted to that system--safe, secure, cheap.
Just be sure to take off that easily lost deco ring around the rewind lever, clean the threads of it and the mating surface on the body, put a little Loctite on the threads of the ring and screw it back on tight. I've seen a lot of CLEs w/ missing deco rings! You're SOL to find a new one if yours is missing.