[DonRotolo]

We used cable in 2007 and it was reliable and strong. Yes, it went 'haywire' once or twice, but easily corrected. In 2006 we used belting and that worked fine too. Cable (wire rope) can be 100% reliable if designed properly, and design is no more difficult than with chain or belts.

To the original poster: You need to tell us what went wrong with pulleys in the past. In general, pulleys and wire rope are good, but if you encounter a problem, you need to solve it. Once all problems are solved,. it works wthout problems.