Since I started the banter I feel obliged to respond. Working big warrens I tend to have a MK1 at each end and one in the middle. All I'm trying to do, given that I don't have a wonderful dog, is to let me know where the action is or is likely to be. I hope you all agree that the boxes, set at about 3 foot, are a bonus. Not only that, the collars are less likely to give you problems in the nets. Admitted I'm an old hand, couldn't get on with the new MK3 and consistantly get good results with the old gear, have a great friend who wants to change back to a MK1 I think I'm vindicated. Any road on