I added this an electric over hydraulic control to my M6800. WR Long sells the entire kit, set up specifically for each model tractor. Mine costs around $600 if I remember correctly. My dealer installed it but it would not be too hard to do it yourself. It did require a little welding to attach the quick connect bracket to the
FEL. You can go to the WR Long website to see this. They were really nice to work with.