in my humble opinion, an almost perfect detector with the addition of two items. A manual & fixed ground balance switch and a frequency shift like the Vaquero & Cibola. The GB switch would let the operator choose either manual GB, or a preset GB like the Cibola. This would be useful in ground with little or no minerals. You can't get anywhere close to another Tejon without crosstalk and depth loss so the frequency shift would be most welcome.