About 4 years ago I was seriously interested in this machine, but found a way to put a "tab check" with toggle switch on my Silver umax to where it operated similar to the Tejon. Lately my interest has been piqued again, especially after today when I was using my Silver in this manner(I normally just leave it on min. disc. and dig everything). My question is on the topic of mineralization. There seems to be as many posters saying the Tejon's not very deep in mineralized soil as those who say it's malarky. It seems to me that a g/b would not fail that miserably. My ground is moderate mineralization and I don't think I would have any problems, but I would like to know from any experienced users about the truth of the matter as I think after careful consideration this could be my final machine in my arsenal. Thanks to all.