I'm not a Fender guy, and am not intimately familiar with the bewildering number of variations on Fender basses and how they relate to one another. It astounds me that the company can make SO many different Jazz basses at such wildly different price points. A friend was asking me about Fenders and when I tried to answer him I realized I really don't know all that much about the line. I do know that there are Squiers (crap), MIM, MIJ and MIA basses, and then there's the Custom Shop. But beyond that I know next to nothing. I did a search on this, but didn't get quite what I was looking for...so before you tell me to use the search tool, please be aware that I already have. I'm not looking for opinions per se...I'm looking for a simple description of the actual differences between the lines. Questions: - Are there any actual quantifiable (as opposed to subjective) differences between MIA, MIJ and MIM Fenders? If so, what are they? - Are the dimensions all the same, or are there physical differences? - Are the materials different, and if so in what way? - Are the manufacturing methods different, and if so how? Isn't all this stuff just done on milling machines anyway? - My understanding (which may be completely wrong) is that MIM Fenders are considered the lowest quality of the three...MIJ one step up, and MIA the highest quality. Is this correct? What makes it so?