thanks all, you make it sound dead easy, !!!!!!To assist with fore and aft levelling ( done by raising or lowering the jockey wheel ) I have a small spirit level Araldited -lengthways- to the A-frame close to the jockey wheel clamp. Then as you turn the jockey wheel handle you can see the bubble move 'till you reach level
OR HUBBY !!why bother its good fun to watch things roll down one end of the caravan.....especially the wife