Another to consider is the Kwikee Kwiver Combo. It's a detachable 4-arrow, much like the fast 4. I've had the same one for the past 3+ years and it's still almost like new in all regards, meaning it's very rugged. It's also very quiet - never had any noise come from it. I also like that it has two arrow grippers and handles "regular" size and small diameter shafts.