JTB,sorry your mate lost his dog,i thought you were already using B&F equipment,there's no way i would use Deben for a terrier anymore,maybe for ferrets,and i will be be buying one soon,look forward to getting out on a dig soon pal,by the way you have a pm on smoochers.
Bryan,the long range deben is not worth having,as above spend that bit more for the right equipment
as they are better for searching longer ranges horizontally and vertically,if they use these things to find people they have to be reliable and very accurate,
Higgins