Today all the electrics wired up and working well. The only problem with this set up is you've no control over plough depth. With the tractor with plough attached on the bench. Plough going down over the end, I worked out it was going in about 7 - 8 inches. So a think was in order.
The clevis that attaches actuator ram to hitch is about 3 - 4 inch long. So I thought i'd drill some more holes to give a selection of positions on the hitch.
The end hole, from the right side of photo', is the original, giving 7 - 8 inch depth. I don't think I'll ever be ploughing that deep.
2nd from end gives about 6" depth. That's about right.
3rd hole gives 5" and I don't think the last hole will ever be used. Not for ploughing anyway.
All that's left now is to try things out.