mark 1 locator is by far the best, and if not do it the old way and get a Hob and a line mate. A good sharp bulldog, plenty of spun nylon nets. A lots of good permission if not dont bother. Good luck
i hav a patterdale cross bull she is 6 yrs old and hasnt got any teeth left. she use 2 bay for the first few mins but then she would mix it quiet badly i do recomend putting a dash of bull in them for staying abillty and they have very good noses if they have any left lol