We have a lot of heavy clay land that holds the water on the surface. There is shale at about 1 foot down. I am thinking of mole ploughing down to 1 foot to help the drainage. I have an 85hp tractor. The land is gently sloping and I will open ditches where necessary to mole in to. What is the best mole plough for my tractor size? I have been leaning towards a Browns Consort. Any advice appreciated.