I totally understand what your saying Steve, I like your analysis of the detectors you choose at this particular time. I have been detecting long enough to know as we grow older and more experienced, always learning, we want the best machine for the particular job we are doing. I am with you on the PI, at this moment I am hitting some trashy areas on tailings,crawling on my fours..I can tell you my shoulders in the evening feel it. I want a light weight vlf for these types of areas. Having your arm extended and scanning under bushes with a PI can do some damage. I have used the MXT in the past, but the weight would discourage me from buying another for myself. I have used the lobo and taken the housing off to relive the pain in my shoulder, but after reading some of your posts about the others I have narrowed it down to the F19 for now or the Fisher GB Pro.