We had Circle B put up 3 Valley pivots for us. The last pivot they installed had a swing arm on it. We got it put up and started using it and everything seemed good. A little later that year we had a sink hole appear and the pivot drove into the hole and tipped over. We discovered that Circle B wired the pivot wrong so when it got on the decline it didn't shut off and kept going until it tipped over. Circle B stuck us with the entire bill!!! They wouldn't even try and help out. We have put up several more pivots and since then and used another company that is better priced, better on service, and does a better job. Circle B won't set foot on my place again!