Hi Tammie, years ago I worked closely with Ozone designer Rob Whittall and he was all about performance with simplicity. He nailed it with the Reos and they performed really well without pulleys, the only issue in the early models was wanting a touch more responsive depower. Straight out of the box, the Airush Waves perform at another level again. I've had way too much fun to want to change anything so I haven't even tried yet, but definitely look forward to hearing from anyone who has.