We build a horsebox that is 5.269m long and 1.676m wide. We load two horses of approxamately 700Kg each. In other words 1.4 tons at the back of the horsebox. The space from the back of the horsebox to the front feet of the horses is 2m. The rest of the 3.269m is the tackroom with approxamatly 250kg weight loaded into it. The question is, where do I place the two rubber suspension axles so that it stays balanced. See diagram.